121690422755 has 8 divisors (see below), whose sum is σ = 159303826224. Its totient is φ = 88502125600.

The previous prime is 121690422751. The next prime is 121690422761. The reversal of 121690422755 is 557224096121.

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

It is not a de Polignac number, because 121690422755 - 2² = 121690422751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121690422751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106276516 + ... + 1106276625.

It is an arithmetic number, because the mean of its divisors is an integer number (19912978278).

Almost surely, 2^121690422755 is an apocalyptic number.

121690422755 is a deficient number, since it is larger than the sum of its proper divisors (37613403469).

121690422755 is a wasteful number, since it uses less digits than its factorization.

121690422755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212553157.

The product of its (nonzero) digits is 302400, while the sum is 44.

It can be divided in two parts, 121690 and 422755, that added together give a palindrome (544445).

The spelling of 121690422755 in words is "one hundred twenty-one billion, six hundred ninety million, four hundred twenty-two thousand, seven hundred fifty-five".