202111311013 has 4 divisors (see below), whose sum is σ = 202130276128. Its totient is φ = 202092345900.

The previous prime is 202111311007. The next prime is 202111311043. The reversal of 202111311013 is 310113111202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 310113111202 = 2 ⋅155056555601.

It is a cyclic number.

It is not a de Polignac number, because 202111311013 - 2⁵ = 202111310981 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 (202111311043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9466563 + ... + 9487888.

It is an arithmetic number, because the mean of its divisors is an integer number (50532569032).

Almost surely, 2^202111311013 is an apocalyptic number.

It is an amenable number.

202111311013 is a deficient number, since it is larger than the sum of its proper divisors (18965115).

202111311013 is a wasteful number, since it uses less digits than its factorization.

202111311013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18965114.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 202111311013 its reverse (310113111202), we get a palindrome (512224422215).

The spelling of 202111311013 in words is "two hundred two billion, one hundred eleven million, three hundred eleven thousand, thirteen".