2121200031 has 8 divisors (see below), whose sum is σ = 2874631984. Its totient is φ = 1390950720.

The previous prime is 2121200023. The next prime is 2121200057. The reversal of 2121200031 is 1300021212.

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

It is not a de Polignac number, because 2121200031 - 2³ = 2121200023 is a prime.

It is a super-2 number, since 2×2121200031² = 8998979143028801922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200021) 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, 5795446 + ... + 5795811.

It is an arithmetic number, because the mean of its divisors is an integer number (359328998).

Almost surely, 2^2121200031 is an apocalyptic number.

2121200031 is a deficient number, since it is larger than the sum of its proper divisors (753431953).

2121200031 is a wasteful number, since it uses less digits than its factorization.

2121200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11591321.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2121200031 is about 46056.4873932001. The cubic root of 2121200031 is about 1284.8740015850.

Adding to 2121200031 its reverse (1300021212), we get a palindrome (3421221243).

The spelling of 2121200031 in words is "two billion, one hundred twenty-one million, two hundred thousand, thirty-one".