20313002121 has 32 divisors (see below), whose sum is σ = 28348185600. Its totient is φ = 12921323520.

The previous prime is 20313002093. The next prime is 20313002141. The reversal of 20313002121 is 12120031302.

It is not a de Polignac number, because 20313002121 - 2¹⁷ = 20312871049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20313002121.

It is not an unprimeable number, because it can be changed into a prime (20313002141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7838536 + ... + 7841126.

It is an arithmetic number, because the mean of its divisors is an integer number (885880800).

Almost surely, 2^20313002121 is an apocalyptic number.

It is an amenable number.

20313002121 is a deficient number, since it is larger than the sum of its proper divisors (8035183479).

20313002121 is a wasteful number, since it uses less digits than its factorization.

20313002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20313002121 its reverse (12120031302), we get a palindrome (32433033423).

The spelling of 20313002121 in words is "twenty billion, three hundred thirteen million, two thousand, one hundred twenty-one".