121312013133 has 4 divisors (see below), whose sum is σ = 161749350848. Its totient is φ = 80874675420.

The previous prime is 121312013129. The next prime is 121312013197. The reversal of 121312013133 is 331310213121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 121312013133 - 2² = 121312013129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312003133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20218668853 + ... + 20218668858.

It is an arithmetic number, because the mean of its divisors is an integer number (40437337712).

Almost surely, 2^121312013133 is an apocalyptic number.

It is an amenable number.

121312013133 is a deficient number, since it is larger than the sum of its proper divisors (40437337715).

121312013133 is an equidigital number, since it uses as much as digits as its factorization.

121312013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40437337714.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 121312013133 its reverse (331310213121), we get a palindrome (452622226254).

The spelling of 121312013133 in words is "one hundred twenty-one billion, three hundred twelve million, thirteen thousand, one hundred thirty-three".