20123122001 has 4 divisors (see below), whose sum is σ = 20125529712. Its totient is φ = 20120714292.

The previous prime is 20123121989. The next prime is 20123122007. The reversal of 20123122001 is 10022132102.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 20123122001 - 2²⁶ = 20056013137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123122007) 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, 1191275 + ... + 1208048.

It is an arithmetic number, because the mean of its divisors is an integer number (5031382428).

Almost surely, 2^20123122001 is an apocalyptic number.

It is an amenable number.

20123122001 is a deficient number, since it is larger than the sum of its proper divisors (2407711).

20123122001 is an equidigital number, since it uses as much as digits as its factorization.

20123122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407710.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20123122001 its reverse (10022132102), we get a palindrome (30145254103).

The spelling of 20123122001 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-two thousand, one".