2100101123 has 4 divisors (see below), whose sum is σ = 2148940728. Its totient is φ = 2051261520.

The previous prime is 2100101117. The next prime is 2100101153. The reversal of 2100101123 is 3211010012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2100101123 - 2²⁰ = 2099052547 is a prime.

It is a super-2 number, since 2×2100101123² = 8820849453651722258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100101153) 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, 24419738 + ... + 24419823.

It is an arithmetic number, because the mean of its divisors is an integer number (537235182).

Almost surely, 2^2100101123 is an apocalyptic number.

2100101123 is a deficient number, since it is larger than the sum of its proper divisors (48839605).

2100101123 is an equidigital number, since it uses as much as digits as its factorization.

2100101123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48839604.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2100101123 is about 45826.8602786619. The cubic root of 2100101123 is about 1280.5997195793.

Adding to 2100101123 its reverse (3211010012), we get a palindrome (5311111135).

The spelling of 2100101123 in words is "two billion, one hundred million, one hundred one thousand, one hundred twenty-three".