121213123231 has 8 divisors (see below), whose sum is σ = 123042047024. Its totient is φ = 119384781120.

The previous prime is 121213123169. The next prime is 121213123267. The reversal of 121213123231 is 132321312121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121213123231 is a prime.

It is a super-2 number, since 2×121213123231² (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 (121213126231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283981 + ... + 568393.

It is an arithmetic number, because the mean of its divisors is an integer number (15380255878).

Almost surely, 2^121213123231 is an apocalyptic number.

121213123231 is a deficient number, since it is larger than the sum of its proper divisors (1828923793).

121213123231 is an equidigital number, since it uses as much as digits as its factorization.

121213123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290841.

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

Adding to 121213123231 its reverse (132321312121), we get a palindrome (253534435352).

The spelling of 121213123231 in words is "one hundred twenty-one billion, two hundred thirteen million, one hundred twenty-three thousand, two hundred thirty-one".