20101020012 has 36 divisors (see below), whose sum is σ = 51423099000. Its totient is φ = 6619612032.

The previous prime is 20101019959. The next prime is 20101020013. The reversal of 20101020012 is 21002010102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20101019976 and 20101020003.

It is not an unprimeable number, because it can be changed into a prime (20101020013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3360637 + ... + 3366612.

Almost surely, 2^20101020012 is an apocalyptic number.

It is an amenable number.

20101020012 is an abundant number, since it is smaller than the sum of its proper divisors (31322078988).

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

20101020012 is a wasteful number, since it uses less digits than its factorization.

20101020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727342 (or 6727337 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20101020012 its reverse (21002010102), we get a palindrome (41103030114).

The spelling of 20101020012 in words is "twenty billion, one hundred one million, twenty thousand, twelve".