20011312120 has 32 divisors (see below), whose sum is σ = 45223822800. Its totient is φ = 7969259008.

The previous prime is 20011312073. The next prime is 20011312121. The reversal of 20011312120 is 2121311002.

It is a super-2 number, since 2×20011312120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20011312120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011312121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092865 + ... + 1111024.

Almost surely, 2^20011312120 is an apocalyptic number.

20011312120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011312120 is an abundant number, since it is smaller than the sum of its proper divisors (25212510680).

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

20011312120 is a wasteful number, since it uses less digits than its factorization.

20011312120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204127 (or 2204123 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20011312120 its reverse (2121311002), we get a palindrome (22132623122).

The spelling of 20011312120 in words is "twenty billion, eleven million, three hundred twelve thousand, one hundred twenty".