20111211201012 has 96 divisors (see below), whose sum is σ = 48285747224064. Its totient is φ = 6510201984000.

The previous prime is 20111211201001. The next prime is 20111211201071. The reversal of 20111211201012 is 21010211211102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111211200982 and 20111211201000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2289783973 + ... + 2289792755.

It is an arithmetic number, because the mean of its divisors is an integer number (502976533584).

Almost surely, 2^{20111211201012} is an apocalyptic number.

It is an amenable number.

20111211201012 is an abundant number, since it is smaller than the sum of its proper divisors (28174536023052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111211201012 is a wasteful number, since it uses less digits than its factorization.

20111211201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18009 (or 18007 counting only the distinct ones).

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

Adding to 20111211201012 its reverse (21010211211102), we get a palindrome (41121422412114).

The spelling of 20111211201012 in words is "twenty trillion, one hundred eleven billion, two hundred eleven million, two hundred one thousand, twelve".