20102111212 has 12 divisors (see below), whose sum is σ = 35333668440. Its totient is φ = 10006777376.

The previous prime is 20102111189. The next prime is 20102111257. The reversal of 20102111212 is 21211120102.

It is a super-2 number, since 2×20102111212² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20102111192 and 20102111201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11068537 + ... + 11070352.

It is an arithmetic number, because the mean of its divisors is an integer number (2944472370).

Almost surely, 2^20102111212 is an apocalyptic number.

It is an amenable number.

20102111212 is a deficient number, since it is larger than the sum of its proper divisors (15231557228).

20102111212 is a wasteful number, since it uses less digits than its factorization.

20102111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139120 (or 22139118 counting only the distinct ones).

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

Adding to 20102111212 its reverse (21211120102), we get a palindrome (41313231314).

The spelling of 20102111212 in words is "twenty billion, one hundred two million, one hundred eleven thousand, two hundred twelve".