121622919 has 24 divisors (see below), whose sum is σ = 184958592. Its totient is φ = 70495920.

The previous prime is 121622909. The next prime is 121622953. The reversal of 121622919 is 919226121.

It is not a de Polignac number, because 121622919 - 2¹¹ = 121620871 is a prime.

It is a super-2 number, since 2×121622919² = 29584268852161122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 121622919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121622909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13974 + ... + 20940.

It is an arithmetic number, because the mean of its divisors is an integer number (7706608).

Almost surely, 2^121622919 is an apocalyptic number.

121622919 is a deficient number, since it is larger than the sum of its proper divisors (63335673).

121622919 is a wasteful number, since it uses less digits than its factorization.

121622919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7004 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 121622919 is about 11028.2781520961. The cubic root of 121622919 is about 495.4560555657.

The spelling of 121622919 in words is "one hundred twenty-one million, six hundred twenty-two thousand, nine hundred nineteen".