123112021442 has 16 divisors (see below), whose sum is σ = 185375250432. Its totient is φ = 61320335040.

The previous prime is 123112021441. The next prime is 123112021469. The reversal of 123112021442 is 244120211321.

It is not an unprimeable number, because it can be changed into a prime (123112021441) 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 7 ways as a sum of consecutive naturals, for example, 5982623 + ... + 6003165.

It is an arithmetic number, because the mean of its divisors is an integer number (11585953152).

Almost surely, 2^123112021442 is an apocalyptic number.

123112021442 is a deficient number, since it is larger than the sum of its proper divisors (62263228990).

123112021442 is a wasteful number, since it uses less digits than its factorization.

123112021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31873.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 123112021442 its reverse (244120211321), we get a palindrome (367232232763).

The spelling of 123112021442 in words is "one hundred twenty-three billion, one hundred twelve million, twenty-one thousand, four hundred forty-two".