122021455409621 has 4 divisors (see below), whose sum is σ = 125319332582892. Its totient is φ = 118723578236352.

The previous prime is 122021455409617. The next prime is 122021455409677. The reversal of 122021455409621 is 126904554120221.

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 43921569202225 + 78099886207396 = 6627335^2 + 8837414^2 .

It is a cyclic number.

It is not a de Polignac number, because 122021455409621 - 2² = 122021455409617 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 (122021455409681) 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, 1648938586580 + ... + 1648938586653.

It is an arithmetic number, because the mean of its divisors is an integer number (31329833145723).

Almost surely, 2^{122021455409621} is an apocalyptic number.

It is an amenable number.

122021455409621 is a deficient number, since it is larger than the sum of its proper divisors (3297877173271).

122021455409621 is an equidigital number, since it uses as much as digits as its factorization.

122021455409621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297877173270.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 122021455409621 in words is "one hundred twenty-two trillion, twenty-one billion, four hundred fifty-five million, four hundred nine thousand, six hundred twenty-one".