20102112112011 has 16 divisors (see below), whose sum is σ = 26831716946208. Its totient is φ = 13386962931200.

The previous prime is 20102112111947. The next prime is 20102112112031. The reversal of 20102112112011 is 11021121120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20102112112011 - 2⁶ = 20102112111947 is a prime.

It is a super-2 number, since 2×20102112112011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20102112112031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14711881 + ... + 16020101.

It is an arithmetic number, because the mean of its divisors is an integer number (1676982309138).

Almost surely, 2^{20102112112011} is an apocalyptic number.

20102112112011 is a deficient number, since it is larger than the sum of its proper divisors (6729604834197).

20102112112011 is a wasteful number, since it uses less digits than its factorization.

20102112112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313742.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20102112112011 its reverse (11021121120102), we get a palindrome (31123233232113).

The spelling of 20102112112011 in words is "twenty trillion, one hundred two billion, one hundred twelve million, one hundred twelve thousand, eleven".