122121145 has 16 divisors (see below), whose sum is σ = 153964800. Its totient is φ = 92809024.

The previous prime is 122121119. The next prime is 122121187. The reversal of 122121145 is 541121221.

It is a cyclic number.

It is not a de Polignac number, because 122121145 - 2⁷ = 122121017 is a prime.

It is a super-2 number, since 2×122121145² = 29827148112222050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13572 + ... + 20698.

It is an arithmetic number, because the mean of its divisors is an integer number (9622800).

Almost surely, 2^122121145 is an apocalyptic number.

It is an amenable number.

122121145 is a deficient number, since it is larger than the sum of its proper divisors (31843655).

122121145 is a wasteful number, since it uses less digits than its factorization.

122121145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304.

The product of its digits is 160, while the sum is 19.

The square root of 122121145 is about 11050.8436329540. The cubic root of 122121145 is about 496.1316759858.

Adding to 122121145 its reverse (541121221), we get a palindrome (663242366).

It can be divided in two parts, 1221 and 21145, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 122121145 in words is "one hundred twenty-two million, one hundred twenty-one thousand, one hundred forty-five".