402122111 has 16 divisors (see below), whose sum is σ = 432030720. Its totient is φ = 373584960.

The previous prime is 402122057. The next prime is 402122117. The reversal of 402122111 is 111221204.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402122111 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 (402122117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76091 + ... + 81203.

It is an arithmetic number, because the mean of its divisors is an integer number (27001920).

Almost surely, 2^402122111 is an apocalyptic number.

402122111 is a deficient number, since it is larger than the sum of its proper divisors (29908609).

402122111 is a wasteful number, since it uses less digits than its factorization.

402122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5246.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 402122111 is about 20052.9825961127. The cubic root of 402122111 is about 738.1069895538.

Adding to 402122111 its reverse (111221204), we get a palindrome (513343315).

The spelling of 402122111 in words is "four hundred two million, one hundred twenty-two thousand, one hundred eleven".