1000021313121 has 8 divisors (see below), whose sum is σ = 1391334000960. Its totient is φ = 637694750352.

The previous prime is 1000021313111. The next prime is 1000021313131. The reversal of 1000021313121 is 1213131200001.

It is a happy number.

1000021313121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1000021313111) and next prime (1000021313131).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000021313121 - 2²³ = 1000012924513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000021313121.

It is not an unprimeable number, because it can be changed into a prime (1000021313111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7246531186 + ... + 7246531323.

It is an arithmetic number, because the mean of its divisors is an integer number (173916750120).

Almost surely, 2^{1000021313121} is an apocalyptic number.

It is an amenable number.

1000021313121 is a deficient number, since it is larger than the sum of its proper divisors (391312687839).

1000021313121 is a wasteful number, since it uses less digits than its factorization.

1000021313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14493062535.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1000021313121 its reverse (1213131200001), we get a palindrome (2213152513122).

The spelling of 1000021313121 in words is "one trillion, twenty-one million, three hundred thirteen thousand, one hundred twenty-one".