121038222665 has 4 divisors (see below), whose sum is σ = 145245867204. Its totient is φ = 96830578128.

The previous prime is 121038222647. The next prime is 121038222673. The reversal of 121038222665 is 566222830121.

It is a happy number.

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 69757261456 + 51280961209 = 264116^2 + 226453^2 .

It is a cyclic number.

It is not a de Polignac number, because 121038222665 - 2¹⁴ = 121038206281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12103822262 + ... + 12103822271.

It is an arithmetic number, because the mean of its divisors is an integer number (36311466801).

Almost surely, 2^121038222665 is an apocalyptic number.

It is an amenable number.

121038222665 is a deficient number, since it is larger than the sum of its proper divisors (24207644539).

121038222665 is an equidigital number, since it uses as much as digits as its factorization.

121038222665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24207644538.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 121038222665 in words is "one hundred twenty-one billion, thirty-eight million, two hundred twenty-two thousand, six hundred sixty-five".