123021454451 has 32 divisors (see below), whose sum is σ = 149776112640. Its totient is φ = 98808667776.

The previous prime is 123021454427. The next prime is 123021454453. The reversal of 123021454451 is 154454120321.

It is not a de Polignac number, because 123021454451 - 2²² = 123017260147 is a prime.

It is a super-2 number, since 2×123021454451² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123021454453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1325570 + ... + 1415336.

It is an arithmetic number, because the mean of its divisors is an integer number (4680503520).

Almost surely, 2^123021454451 is an apocalyptic number.

123021454451 is a deficient number, since it is larger than the sum of its proper divisors (26754658189).

123021454451 is a wasteful number, since it uses less digits than its factorization.

123021454451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90003.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 123021454451 its reverse (154454120321), we get a palindrome (277475574772).

The spelling of 123021454451 in words is "one hundred twenty-three billion, twenty-one million, four hundred fifty-four thousand, four hundred fifty-one".