123206220641 has 4 divisors (see below), whose sum is σ = 140807109312. Its totient is φ = 105605331972.

The previous prime is 123206220583. The next prime is 123206220659. The reversal of 123206220641 is 146022602321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146022602321 = 29 ⋅5035262149.

It is not a de Polignac number, because 123206220641 - 2¹⁸ = 123205958497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123206220941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8800444325 + ... + 8800444338.

It is an arithmetic number, because the mean of its divisors is an integer number (35201777328).

Almost surely, 2^123206220641 is an apocalyptic number.

It is an amenable number.

123206220641 is a deficient number, since it is larger than the sum of its proper divisors (17600888671).

123206220641 is an equidigital number, since it uses as much as digits as its factorization.

123206220641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17600888670.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 123206220641 its reverse (146022602321), we get a palindrome (269228822962).

The spelling of 123206220641 in words is "one hundred twenty-three billion, two hundred six million, two hundred twenty thousand, six hundred forty-one".