121475626621 has 6 divisors (see below), whose sum is σ = 121815070622. Its totient is φ = 121137125880.

The previous prime is 121475626607. The next prime is 121475626669. The reversal of 121475626621 is 126626574121.

It can be written as a sum of positive squares in only one way, i.e., 76612150521 + 44863476100 = 276789^2 + 211810^2 .

It is not a de Polignac number, because 121475626621 - 2¹¹ = 121475624573 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 (121475620621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342390 + ... + 600151.

Almost surely, 2^121475626621 is an apocalyptic number.

It is an amenable number.

121475626621 is a deficient number, since it is larger than the sum of its proper divisors (339444001).

121475626621 is an frugal number, since it uses more digits than its factorization.

121475626621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943259 (or 942900 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The spelling of 121475626621 in words is "one hundred twenty-one billion, four hundred seventy-five million, six hundred twenty-six thousand, six hundred twenty-one".