121031013 has 4 divisors (see below), whose sum is σ = 161374688. Its totient is φ = 80687340.

The previous prime is 121030993. The next prime is 121031021. The reversal of 121031013 is 310130121.

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 not a de Polignac number, because 121031013 - 2⁵ = 121030981 is a prime.

It is a super-2 number, since 2×121031013² = 29297012215612338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121038013) 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, 20171833 + ... + 20171838.

It is an arithmetic number, because the mean of its divisors is an integer number (40343672).

Almost surely, 2^121031013 is an apocalyptic number.

It is an amenable number.

121031013 is a deficient number, since it is larger than the sum of its proper divisors (40343675).

121031013 is an equidigital number, since it uses as much as digits as its factorization.

121031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40343674.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 121031013 is about 11001.4095915024. The cubic root of 121031013 is about 494.6509977427.

Adding to 121031013 its reverse (310130121), we get a palindrome (431161134).

It can be divided in two parts, 1210 and 31013, that added together give a palindrome (32223).

The spelling of 121031013 in words is "one hundred twenty-one million, thirty-one thousand, thirteen".