122194231521 has 4 divisors (see below), whose sum is σ = 162925642032. Its totient is φ = 81462821012.

The previous prime is 122194231501. The next prime is 122194231543. The reversal of 122194231521 is 125132491221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122194231521 - 2⁶ = 122194231457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122194231501) 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, 20365705251 + ... + 20365705256.

It is an arithmetic number, because the mean of its divisors is an integer number (40731410508).

Almost surely, 2^122194231521 is an apocalyptic number.

It is an amenable number.

122194231521 is a deficient number, since it is larger than the sum of its proper divisors (40731410511).

122194231521 is an equidigital number, since it uses as much as digits as its factorization.

122194231521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40731410510.

The product of its digits is 8640, while the sum is 33.

The spelling of 122194231521 in words is "one hundred twenty-two billion, one hundred ninety-four million, two hundred thirty-one thousand, five hundred twenty-one".