123221021121025 has 12 divisors (see below), whose sum is σ = 152794276111872. Its totient is φ = 98576681463440.

The previous prime is 123221021120959. The next prime is 123221021121049. The reversal of 123221021121025 is 520121120122321.

It is not a de Polignac number, because 123221021121025 - 2⁹ = 123221021120513 is a prime.

It is a super-2 number, since 2×123221021121025² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17765472 + ... + 23707678.

It is an arithmetic number, because the mean of its divisors is an integer number (12732856342656).

Almost surely, 2^{123221021121025} is an apocalyptic number.

It is an amenable number.

123221021121025 is a deficient number, since it is larger than the sum of its proper divisors (29573254990847).

123221021121025 is an equidigital number, since it uses as much as digits as its factorization.

123221021121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771680 (or 6771675 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 123221021121025 its reverse (520121120122321), we get a palindrome (643342141243346).

The spelling of 123221021121025 in words is "one hundred twenty-three trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, twenty-five".