20120211011 has 4 divisors (see below), whose sum is σ = 20121564624. Its totient is φ = 20118857400.

The previous prime is 20120210989. The next prime is 20120211031. The reversal of 20120211011 is 11011202102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11011202102 = 2 ⋅5505601051.

It is a cyclic number.

It is not a de Polignac number, because 20120211011 - 2⁶ = 20120210947 is a prime.

It is a super-2 number, since 2×20120211011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120210983 and 20120211001.

It is not an unprimeable number, because it can be changed into a prime (20120211031) 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, 654260 + ... + 684321.

It is an arithmetic number, because the mean of its divisors is an integer number (5030391156).

Almost surely, 2^20120211011 is an apocalyptic number.

20120211011 is a deficient number, since it is larger than the sum of its proper divisors (1353613).

20120211011 is a wasteful number, since it uses less digits than its factorization.

20120211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353612.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20120211011 its reverse (11011202102), we get a palindrome (31131413113).

The spelling of 20120211011 in words is "twenty billion, one hundred twenty million, two hundred eleven thousand, eleven".