121214554531 has 6 divisors (see below), whose sum is σ = 141004685940. Its totient is φ = 103898189556.

The previous prime is 121214554523. The next prime is 121214554603. The reversal of 121214554531 is 135455412121.

It is not a de Polignac number, because 121214554531 - 2³ = 121214554523 is a prime.

It is a super-2 number, since 2×121214554531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121214554511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1236883161 + ... + 1236883258.

It is an arithmetic number, because the mean of its divisors is an integer number (23500780990).

Almost surely, 2^121214554531 is an apocalyptic number.

121214554531 is a deficient number, since it is larger than the sum of its proper divisors (19790131409).

121214554531 is an equidigital number, since it uses as much as digits as its factorization.

121214554531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473766433 (or 2473766426 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

Adding to 121214554531 its reverse (135455412121), we get a palindrome (256669966652).

The spelling of 121214554531 in words is "one hundred twenty-one billion, two hundred fourteen million, five hundred fifty-four thousand, five hundred thirty-one".