113121201021 has 4 divisors (see below), whose sum is σ = 150828268032. Its totient is φ = 75414134012.

The previous prime is 113121201013. The next prime is 113121201029. The reversal of 113121201021 is 120102121311.

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.

It is an interprime number because it is at equal distance from previous prime (113121201013) and next prime (113121201029).

It is a cyclic number.

It is not a de Polignac number, because 113121201021 - 2³ = 113121201013 is a prime.

It is a super-2 number, since 2×113121201021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121201029) 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, 18853533501 + ... + 18853533506.

It is an arithmetic number, because the mean of its divisors is an integer number (37707067008).

Almost surely, 2^113121201021 is an apocalyptic number.

It is an amenable number.

113121201021 is a deficient number, since it is larger than the sum of its proper divisors (37707067011).

113121201021 is an equidigital number, since it uses as much as digits as its factorization.

113121201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37707067010.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 113121201021 its reverse (120102121311), we get a palindrome (233223322332).

The spelling of 113121201021 in words is "one hundred thirteen billion, one hundred twenty-one million, two hundred one thousand, twenty-one".