10120021012 has 36 divisors (see below), whose sum is σ = 18314200800. Its totient is φ = 4892329264.

The previous prime is 10120021003. The next prime is 10120021013. The reversal of 10120021012 is 21012002101.

It is a self number, because there is not a number n which added to its sum of digits gives 10120021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120021013) 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, 726489 + ... + 740287.

It is an arithmetic number, because the mean of its divisors is an integer number (508727800).

Almost surely, 2^10120021012 is an apocalyptic number.

It is an amenable number.

10120021012 is a deficient number, since it is larger than the sum of its proper divisors (8194179788).

10120021012 is a wasteful number, since it uses less digits than its factorization.

10120021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13980 (or 13931 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 10120021012 its reverse (21012002101), we get a palindrome (31132023113).

It can be divided in two parts, 1012002101 and 2, that multiplied together give a palindrome (2024004202).

The spelling of 10120021012 in words is "ten billion, one hundred twenty million, twenty-one thousand, twelve".