122578021 has 16 divisors (see below), whose sum is σ = 128494080. Its totient is φ = 116847360.

The previous prime is 122577997. The next prime is 122578033. The reversal of 122578021 is 120875221.

It is a cyclic number.

It is not a de Polignac number, because 122578021 - 2⁵ = 122577989 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 (122578051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 363565 + ... + 363901.

It is an arithmetic number, because the mean of its divisors is an integer number (8030880).

Almost surely, 2^122578021 is an apocalyptic number.

It is an amenable number.

122578021 is a deficient number, since it is larger than the sum of its proper divisors (5916059).

122578021 is a wasteful number, since it uses less digits than its factorization.

122578021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 122578021 is about 11071.4958790581. The cubic root of 122578021 is about 496.7496103887.

The spelling of 122578021 in words is "one hundred twenty-two million, five hundred seventy-eight thousand, twenty-one".