31234202421 has 8 divisors (see below), whose sum is σ = 42771160224. Its totient is φ = 20260023120.

The previous prime is 31234202393. The next prime is 31234202449. The reversal of 31234202421 is 12420243213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31234202393) and next prime (31234202449).

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

It is not a de Polignac number, because 31234202421 - 2¹⁸ = 31233940277 is a prime.

It is a super-2 number, since 2×31234202421² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31234202391 and 31234202400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234202491) 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, 140694495 + ... + 140694716.

It is an arithmetic number, because the mean of its divisors is an integer number (5346395028).

Almost surely, 2^31234202421 is an apocalyptic number.

It is an amenable number.

31234202421 is a deficient number, since it is larger than the sum of its proper divisors (11536957803).

31234202421 is a wasteful number, since it uses less digits than its factorization.

31234202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281389251.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 31234202421 its reverse (12420243213), we get a palindrome (43654445634).

The spelling of 31234202421 in words is "thirty-one billion, two hundred thirty-four million, two hundred two thousand, four hundred twenty-one".