122221042551 has 24 divisors (see below), whose sum is σ = 177089406000. Its totient is φ = 81228182400.

The previous prime is 122221042529. The next prime is 122221042553. The reversal of 122221042551 is 155240122221.

122221042551 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 2 + 104 + 2 + 551 = 666.

It is not a de Polignac number, because 122221042551 - 2²⁵ = 122187488119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221042553) 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, 4211571 + ... + 4240491.

It is an arithmetic number, because the mean of its divisors is an integer number (7378725250).

Almost surely, 2^122221042551 is an apocalyptic number.

122221042551 is a deficient number, since it is larger than the sum of its proper divisors (54868363449).

122221042551 is a wasteful number, since it uses less digits than its factorization.

122221042551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30367 (or 30364 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 122221042551 its reverse (155240122221), we get a palindrome (277461164772).

The spelling of 122221042551 in words is "one hundred twenty-two billion, two hundred twenty-one million, forty-two thousand, five hundred fifty-one".