123205452051 has 32 divisors (see below), whose sum is σ = 185105442816. Its totient is φ = 72215712000.

The previous prime is 123205452037. The next prime is 123205452067. The reversal of 123205452051 is 150254502321.

It is not a de Polignac number, because 123205452051 - 2¹⁰ = 123205451027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123205450051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1621135 + ... + 1695431.

It is an arithmetic number, because the mean of its divisors is an integer number (5784545088).

Almost surely, 2^123205452051 is an apocalyptic number.

123205452051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123205452051 is a deficient number, since it is larger than the sum of its proper divisors (61899990765).

123205452051 is a wasteful number, since it uses less digits than its factorization.

123205452051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75963.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 123205452051 its reverse (150254502321), we get a palindrome (273459954372).

The spelling of 123205452051 in words is "one hundred twenty-three billion, two hundred five million, four hundred fifty-two thousand, fifty-one".