20121011312 has 20 divisors (see below), whose sum is σ = 38986667640. Its totient is φ = 10059935808.

The previous prime is 20121011291. The next prime is 20121011327. The reversal of 20121011312 is 21311012102.

It is a super-2 number, since 2×20121011312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 497483 + ... + 536405.

It is an arithmetic number, because the mean of its divisors is an integer number (1949333382).

Almost surely, 2^20121011312 is an apocalyptic number.

It is an amenable number.

20121011312 is a deficient number, since it is larger than the sum of its proper divisors (18865656328).

20121011312 is a wasteful number, since it uses less digits than its factorization.

20121011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71240 (or 71234 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20121011312 its reverse (21311012102), we get a palindrome (41432023414).

The spelling of 20121011312 in words is "twenty billion, one hundred twenty-one million, eleven thousand, three hundred twelve".