20211010220011 has 4 divisors (see below), whose sum is σ = 21765703313872. Its totient is φ = 18656317126152.

The previous prime is 20211010219987. The next prime is 20211010220017. The reversal of 20211010220011 is 11002201011202.

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

It is a cyclic number.

It is not a de Polignac number, because 20211010220011 - 2¹⁷ = 20211010088939 is a prime.

It is a super-2 number, since 2×20211010220011² (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: 1554693093847 = 20211010220011 / (2 + 0 + 2 + 1 + 1 + 0 + 1 + 0 + 2 + 2 + 0 + 0 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211010219973 and 20211010220000.

It is not an unprimeable number, because it can be changed into a prime (20211010220017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777346546911 + ... + 777346546936.

It is an arithmetic number, because the mean of its divisors is an integer number (5441425828468).

Almost surely, 2^{20211010220011} is an apocalyptic number.

20211010220011 is a deficient number, since it is larger than the sum of its proper divisors (1554693093861).

20211010220011 is a wasteful number, since it uses less digits than its factorization.

20211010220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554693093860.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20211010220011 its reverse (11002201011202), we get a palindrome (31213211231213).

The spelling of 20211010220011 in words is "twenty trillion, two hundred eleven billion, ten million, two hundred twenty thousand, eleven".