123155020121422 has 16 divisors (see below), whose sum is σ = 190766631186432. Its totient is φ = 59567705291160.

The previous prime is 123155020121363. The next prime is 123155020121431. The reversal of 123155020121422 is 224121020551321.

It is a super-2 number, since 2×123155020121422² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 390399018 + ... + 390714349.

It is an arithmetic number, because the mean of its divisors is an integer number (11922914449152).

Almost surely, 2^{123155020121422} is an apocalyptic number.

123155020121422 is a deficient number, since it is larger than the sum of its proper divisors (67611611065010).

123155020121422 is a wasteful number, since it uses less digits than its factorization.

123155020121422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781115943.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 123155020121422 its reverse (224121020551321), we get a palindrome (347276040672743).

The spelling of 123155020121422 in words is "one hundred twenty-three trillion, one hundred fifty-five billion, twenty million, one hundred twenty-one thousand, four hundred twenty-two".