121216021597 has 8 divisors (see below), whose sum is σ = 132271843680. Its totient is φ = 110166230160.

The previous prime is 121216021547. The next prime is 121216021613. The reversal of 121216021597 is 795120612121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121216021597 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 (121216021547) 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, 1465578 + ... + 1546075.

It is an arithmetic number, because the mean of its divisors is an integer number (16533980460).

Almost surely, 2^121216021597 is an apocalyptic number.

It is an amenable number.

121216021597 is a deficient number, since it is larger than the sum of its proper divisors (11055822083).

121216021597 is a wasteful number, since it uses less digits than its factorization.

121216021597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015323.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 121216021597 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty-one thousand, five hundred ninety-seven".