121333213013 has 4 divisors (see below), whose sum is σ = 125517116940. Its totient is φ = 117149309088.

The previous prime is 121333213009. The next prime is 121333213063. The reversal of 121333213013 is 310312333121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80214701284 + 41118511729 = 283222^2 + 202777^2 .

It is a cyclic number.

It is not a de Polignac number, because 121333213013 - 2² = 121333213009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121333213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333213063) 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, 2091951920 + ... + 2091951977.

It is an arithmetic number, because the mean of its divisors is an integer number (31379279235).

Almost surely, 2^121333213013 is an apocalyptic number.

It is an amenable number.

121333213013 is a deficient number, since it is larger than the sum of its proper divisors (4183903927).

121333213013 is an equidigital number, since it uses as much as digits as its factorization.

121333213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183903926.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 121333213013 its reverse (310312333121), we get a palindrome (431645546134).

The spelling of 121333213013 in words is "one hundred twenty-one billion, three hundred thirty-three million, two hundred thirteen thousand, thirteen".