20120220113 has 12 divisors (see below), whose sum is σ = 23425519140. Its totient is φ = 17230897152.

The previous prime is 20120220101. The next prime is 20120220139. The reversal of 20120220113 is 31102202102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11248087249 + 8872132864 = 106057^2 + 94192^2 .

It is not a de Polignac number, because 20120220113 - 2²⁰ = 20119171537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120220173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121568 + ... + 234561.

It is an arithmetic number, because the mean of its divisors is an integer number (1952126595).

Almost surely, 2^20120220113 is an apocalyptic number.

It is an amenable number.

20120220113 is a deficient number, since it is larger than the sum of its proper divisors (3305299027).

20120220113 is a wasteful number, since it uses less digits than its factorization.

20120220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357296 (or 357289 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20120220113 its reverse (31102202102), we get a palindrome (51222422215).

The spelling of 20120220113 in words is "twenty billion, one hundred twenty million, two hundred twenty thousand, one hundred thirteen".