122121365656251 has 8 divisors (see below), whose sum is σ = 175353755814160. Its totient is φ = 75151609634592.

The previous prime is 122121365656219. The next prime is 122121365656271. The reversal of 122121365656251 is 152656563121221.

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

It is not a de Polignac number, because 122121365656251 - 2⁵ = 122121365656219 is a prime.

It is a super-2 number, since 2×122121365656251² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122121365656251.

It is not an unprimeable number, because it can be changed into a prime (122121365656271) 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, 1565658534016 + ... + 1565658534093.

It is an arithmetic number, because the mean of its divisors is an integer number (21919219476770).

Almost surely, 2^{122121365656251} is an apocalyptic number.

122121365656251 is a deficient number, since it is larger than the sum of its proper divisors (53232390157909).

122121365656251 is a wasteful number, since it uses less digits than its factorization.

122121365656251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131317068125.

The product of its digits is 1296000, while the sum is 48.

The spelling of 122121365656251 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, three hundred sixty-five million, six hundred fifty-six thousand, two hundred fifty-one".