20100321012 has 48 divisors (see below), whose sum is σ = 49594535424. Its totient is φ = 6325824000.

The previous prime is 20100321001. The next prime is 20100321037. The reversal of 20100321012 is 21012300102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 643689 + ... + 674192.

It is an arithmetic number, because the mean of its divisors is an integer number (1033219488).

Almost surely, 2^20100321012 is an apocalyptic number.

It is an amenable number.

20100321012 is an abundant number, since it is smaller than the sum of its proper divisors (29494214412).

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

20100321012 is a wasteful number, since it uses less digits than its factorization.

20100321012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317960 (or 1317958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20100321012 its reverse (21012300102), we get a palindrome (41112621114).

The spelling of 20100321012 in words is "twenty billion, one hundred million, three hundred twenty-one thousand, twelve".