122016421 has 4 divisors (see below), whose sum is σ = 122765152. Its totient is φ = 121267692.

The previous prime is 122016373. The next prime is 122016437. The reversal of 122016421 is 124610221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124610221 = 17 ⋅7330013.

It is a cyclic number.

It is not a de Polignac number, because 122016421 - 2⁹ = 122015909 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 (122016221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374121 + ... + 374446.

It is an arithmetic number, because the mean of its divisors is an integer number (30691288).

Almost surely, 2^122016421 is an apocalyptic number.

It is an amenable number.

122016421 is a deficient number, since it is larger than the sum of its proper divisors (748731).

122016421 is an equidigital number, since it uses as much as digits as its factorization.

122016421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748730.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 122016421 is about 11046.1043359186. The cubic root of 122016421 is about 495.9898175264.

Adding to 122016421 its reverse (124610221), we get a palindrome (246626642).

The spelling of 122016421 in words is "one hundred twenty-two million, sixteen thousand, four hundred twenty-one".