122078021 has 16 divisors (see below), whose sum is σ = 140750400. Its totient is φ = 104934528.

The previous prime is 122078017. The next prime is 122078029. The reversal of 122078021 is 120870221.

It is a cyclic number.

It is not a de Polignac number, because 122078021 - 2² = 122078017 is a prime.

It is a super-2 number, since 2×122078021² = 29806086422552882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122078029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10385 + ... + 18761.

It is an arithmetic number, because the mean of its divisors is an integer number (8796900).

Almost surely, 2^122078021 is an apocalyptic number.

It is an amenable number.

122078021 is a deficient number, since it is larger than the sum of its proper divisors (18672379).

122078021 is a wasteful number, since it uses less digits than its factorization.

122078021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 122078021 is about 11048.8922974206. The cubic root of 122078021 is about 496.0732703174.

It can be divided in two parts, 1220780 and 21, that multiplied together give a triangular number (25636380 = T₇₁₆₀).

The spelling of 122078021 in words is "one hundred twenty-two million, seventy-eight thousand, twenty-one".