121221223021396 has 72 divisors (see below), whose sum is σ = 223286751959040. Its totient is φ = 57577923568704.

The previous prime is 121221223021387. The next prime is 121221223021399. The reversal of 121221223021396 is 693120322122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221223021399) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188313741 + ... + 188956363.

It is an arithmetic number, because the mean of its divisors is an integer number (3101204888320).

Almost surely, 2^{121221223021396} is an apocalyptic number.

It is an amenable number.

121221223021396 is a deficient number, since it is larger than the sum of its proper divisors (102065528937644).

121221223021396 is a wasteful number, since it uses less digits than its factorization.

121221223021396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643285 (or 643260 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 121221223021396 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-three million, twenty-one thousand, three hundred ninety-six".