121213312121 has 8 divisors (see below), whose sum is σ = 132247358688. Its totient is φ = 110181708000.

The previous prime is 121213312109. The next prime is 121213312159.

121213312121 is nontrivially palindromic in base 10.

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 121213312121 - 2¹⁴ = 121213295737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121213312093 and 121213312102.

It is not an unprimeable number, because it can be changed into a prime (121213312021) 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, 506060 + ... + 706061.

It is an arithmetic number, because the mean of its divisors is an integer number (16530919836).

Almost surely, 2^121213312121 is an apocalyptic number.

121213312121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121213312121 is a deficient number, since it is larger than the sum of its proper divisors (11034046567).

121213312121 is a wasteful number, since it uses less digits than its factorization.

121213312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221223.

The product of its digits is 144, while the sum is 20.

It can be divided in two parts, 121213 and 312121, that added together give a palindrome (433334).

The spelling of 121213312121 in words is "one hundred twenty-one billion, two hundred thirteen million, three hundred twelve thousand, one hundred twenty-one".