20102211101011 has 4 divisors (see below), whose sum is σ = 21648535031872. Its totient is φ = 18555887170152.

The previous prime is 20102211100903. The next prime is 20102211101041. The reversal of 20102211101011 is 11010111220102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102211101011 is a prime.

It is a super-2 number, since 2×20102211101011² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1546323930847 = 20102211101011 / (2 + 0 + 1 + 0 + 2 + 2 + 1 + 1 + 1 + 0 + 1 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102211100982 and 20102211101000.

It is not an unprimeable number, because it can be changed into a prime (20102211101041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773161965411 + ... + 773161965436.

It is an arithmetic number, because the mean of its divisors is an integer number (5412133757968).

Almost surely, 2^{20102211101011} is an apocalyptic number.

20102211101011 is a deficient number, since it is larger than the sum of its proper divisors (1546323930861).

20102211101011 is a wasteful number, since it uses less digits than its factorization.

20102211101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546323930860.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20102211101011 its reverse (11010111220102), we get a palindrome (31112322321113).

The spelling of 20102211101011 in words is "twenty trillion, one hundred two billion, two hundred eleven million, one hundred one thousand, eleven".