20123313101 has 4 divisors (see below), whose sum is σ = 20125154652. Its totient is φ = 20121471552.

The previous prime is 20123313097. The next prime is 20123313113. The reversal of 20123313101 is 10131332102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10131332102 = 2 ⋅5065666051.

It can be written as a sum of positive squares in 2 ways, for example, as 11400687076 + 8722626025 = 106774^2 + 93395^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123313101 - 2² = 20123313097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123313101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123313131) 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, 904286 + ... + 926271.

It is an arithmetic number, because the mean of its divisors is an integer number (5031288663).

Almost surely, 2^20123313101 is an apocalyptic number.

It is an amenable number.

20123313101 is a deficient number, since it is larger than the sum of its proper divisors (1841551).

20123313101 is a wasteful number, since it uses less digits than its factorization.

20123313101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841550.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20123313101 its reverse (10131332102), we get a palindrome (30254645203).

The spelling of 20123313101 in words is "twenty billion, one hundred twenty-three million, three hundred thirteen thousand, one hundred one".