122021812 has 12 divisors (see below), whose sum is σ = 232950816. Its totient is φ = 55464440.

The previous prime is 122021791. The next prime is 122021827. The reversal of 122021812 is 218120221.

It is a self number, because there is not a number n which added to its sum of digits gives 122021812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386568 + ... + 1386655.

It is an arithmetic number, because the mean of its divisors is an integer number (19412568).

Almost surely, 2^122021812 is an apocalyptic number.

It is an amenable number.

122021812 is a deficient number, since it is larger than the sum of its proper divisors (110929004).

122021812 is a wasteful number, since it uses less digits than its factorization.

122021812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773238 (or 2773236 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 122021812 is about 11046.3483559048. The cubic root of 122021812 is about 495.9971221217.

It can be divided in two parts, 1220 and 21812, that added together give a palindrome (23032).

The spelling of 122021812 in words is "one hundred twenty-two million, twenty-one thousand, eight hundred twelve".