20102312101 has 4 divisors (see below), whose sum is σ = 20103044832. Its totient is φ = 20101579372.

The previous prime is 20102312077. The next prime is 20102312117. The reversal of 20102312101 is 10121320102.

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 20102312101 - 2¹⁵ = 20102279333 is a prime.

It is a super-2 number, since 2×20102312101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102312141) 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, 323545 + ... + 380638.

It is an arithmetic number, because the mean of its divisors is an integer number (5025761208).

Almost surely, 2^20102312101 is an apocalyptic number.

It is an amenable number.

20102312101 is a deficient number, since it is larger than the sum of its proper divisors (732731).

20102312101 is an equidigital number, since it uses as much as digits as its factorization.

20102312101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732730.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20102312101 its reverse (10121320102), we get a palindrome (30223632203).

The spelling of 20102312101 in words is "twenty billion, one hundred two million, three hundred twelve thousand, one hundred one".