20111201012 has 24 divisors (see below), whose sum is σ = 41971203456. Its totient is φ = 8244343008.

The previous prime is 20111201009. The next prime is 20111201027. The reversal of 20111201012 is 21010211102.

It is a super-2 number, since 2×20111201012² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20111200984 and 20111201002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15613643 + ... + 15614930.

It is an arithmetic number, because the mean of its divisors is an integer number (1748800144).

Almost surely, 2^20111201012 is an apocalyptic number.

It is an amenable number.

20111201012 is an abundant number, since it is smaller than the sum of its proper divisors (21860002444).

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

20111201012 is a wasteful number, since it uses less digits than its factorization.

20111201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31228607 (or 31228605 counting only the distinct ones).

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

Adding to 20111201012 its reverse (21010211102), we get a palindrome (41121412114).

The spelling of 20111201012 in words is "twenty billion, one hundred eleven million, two hundred one thousand, twelve".