20012121012013 has 16 divisors (see below), whose sum is σ = 21863227538880. Its totient is φ = 18206607222144.

The previous prime is 20012121011969. The next prime is 20012121012047. The reversal of 20012121012013 is 31021012121002.

It is a cyclic number.

It is not a de Polignac number, because 20012121012013 - 2²⁵ = 20012087457581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012121012083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21680256 + ... + 22584457.

It is an arithmetic number, because the mean of its divisors is an integer number (1366451721180).

Almost surely, 2^{20012121012013} is an apocalyptic number.

It is an amenable number.

20012121012013 is a deficient number, since it is larger than the sum of its proper divisors (1851106526867).

20012121012013 is a wasteful number, since it uses less digits than its factorization.

20012121012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44265228.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20012121012013 its reverse (31021012121002), we get a palindrome (51033133133015).

The spelling of 20012121012013 in words is "twenty trillion, twelve billion, one hundred twenty-one million, twelve thousand, thirteen".