121031213431 has 8 divisors (see below), whose sum is σ = 128153829024. Its totient is φ = 113908945920.

The previous prime is 121031213423. The next prime is 121031213461. The reversal of 121031213431 is 134312130121.

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 121031213431 - 2³ = 121031213423 is a prime.

It is a super-2 number, since 2×121031213431² (a number of 23 digits) 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 (121031213461) 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, 1063806 + ... + 1172068.

It is an arithmetic number, because the mean of its divisors is an integer number (16019228628).

Almost surely, 2^121031213431 is an apocalyptic number.

121031213431 is a deficient number, since it is larger than the sum of its proper divisors (7122615593).

121031213431 is a wasteful number, since it uses less digits than its factorization.

121031213431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174041.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 121031213431 its reverse (134312130121), we get a palindrome (255343343552).

The spelling of 121031213431 in words is "one hundred twenty-one billion, thirty-one million, two hundred thirteen thousand, four hundred thirty-one".