2121430031 has 8 divisors (see below), whose sum is σ = 2425076640. Its totient is φ = 1817929728.

The previous prime is 2121429943. The next prime is 2121430097. The reversal of 2121430031 is 1300341212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121430031 - 2¹⁸ = 2121167887 is a prime.

It is a super-2 number, since 2×2121430031² = 9000930752857321922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121429991 and 2121430009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121430931) 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, 3506 + ... + 65231.

It is an arithmetic number, because the mean of its divisors is an integer number (303134580).

Almost surely, 2^2121430031 is an apocalyptic number.

2121430031 is a deficient number, since it is larger than the sum of its proper divisors (303646609).

2121430031 is an equidigital number, since it uses as much as digits as its factorization.

2121430031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73153.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121430031 is about 46058.9842593169. The cubic root of 2121430031 is about 1284.9204391888.

Adding to 2121430031 its reverse (1300341212), we get a palindrome (3421771243).

The spelling of 2121430031 in words is "two billion, one hundred twenty-one million, four hundred thirty thousand, thirty-one".