11121213313921 has 2 divisors, whose sum is σ = 11121213313922. Its totient is φ = 11121213313920.

The previous prime is 11121213313913. The next prime is 11121213313961. The reversal of 11121213313921 is 12931331212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10828706490000 + 292506823921 = 3290700^2 + 540839^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121213313921 - 2³ = 11121213313913 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121213313961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560606656960 + 5560606656961.

It is an arithmetic number, because the mean of its divisors is an integer number (5560606656961).

Almost surely, 2^{11121213313921} is an apocalyptic number.

It is an amenable number.

11121213313921 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121213313921 is an equidigital number, since it uses as much as digits as its factorization.

11121213313921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 31.

The spelling of 11121213313921 in words is "eleven trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred thirteen thousand, nine hundred twenty-one".