123206220642 has 16 divisors (see below), whose sum is σ = 248715362592. Its totient is φ = 40684920000.

The previous prime is 123206220583. The next prime is 123206220659. The reversal of 123206220642 is 246022602321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95954359 + ... + 95955642.

It is an arithmetic number, because the mean of its divisors is an integer number (15544710162).

Almost surely, 2^123206220642 is an apocalyptic number.

123206220642 is an abundant number, since it is smaller than the sum of its proper divisors (125509141950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123206220642 is a wasteful number, since it uses less digits than its factorization.

123206220642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191910113.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 123206220642 its reverse (246022602321), we get a palindrome (369228822963).

The spelling of 123206220642 in words is "one hundred twenty-three billion, two hundred six million, two hundred twenty thousand, six hundred forty-two".