20120121010 has 128 divisors (see below), whose sum is σ = 43996981248. Its totient is φ = 6534528000.

The previous prime is 20120120963. The next prime is 20120121029. The reversal of 20120121010 is 1012102102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5632525 + ... + 5636095.

It is an arithmetic number, because the mean of its divisors is an integer number (343726416).

Almost surely, 2^20120121010 is an apocalyptic number.

20120121010 is an abundant number, since it is smaller than the sum of its proper divisors (23876860238).

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

20120121010 is a wasteful number, since it uses less digits than its factorization.

20120121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3760.

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

Adding to 20120121010 its reverse (1012102102), we get a palindrome (21132223112).

The spelling of 20120121010 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, ten".