20121000213013 has 16 divisors (see below), whose sum is σ = 23107488520320. Its totient is φ = 17162548603200.

The previous prime is 20121000212977. The next prime is 20121000213023. The reversal of 20121000213013 is 31031200012102.

It is a de Polignac number, because none of the positive numbers 2^k-20121000213013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121000213023) 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, 10234803 + ... + 12041311.

It is an arithmetic number, because the mean of its divisors is an integer number (1444218032520).

Almost surely, 2^{20121000213013} is an apocalyptic number.

It is an amenable number.

20121000213013 is a deficient number, since it is larger than the sum of its proper divisors (2986488307307).

20121000213013 is a wasteful number, since it uses less digits than its factorization.

20121000213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814268.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20121000213013 its reverse (31031200012102), we get a palindrome (51152200225115).

The spelling of 20121000213013 in words is "twenty trillion, one hundred twenty-one billion, two hundred thirteen thousand, thirteen".