2101123130221 has 4 divisors (see below), whose sum is σ = 2168901295744. Its totient is φ = 2033344964700.

The previous prime is 2101123130189. The next prime is 2101123130261. The reversal of 2101123130221 is 1220313211012.

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 2101123130221 - 2⁵ = 2101123130189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101123130261) 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, 33889082715 + ... + 33889082776.

It is an arithmetic number, because the mean of its divisors is an integer number (542225323936).

Almost surely, 2^{2101123130221} is an apocalyptic number.

It is an amenable number.

2101123130221 is a deficient number, since it is larger than the sum of its proper divisors (67778165523).

2101123130221 is an equidigital number, since it uses as much as digits as its factorization.

2101123130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67778165522.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2101123130221 its reverse (1220313211012), we get a palindrome (3321436341233).

The spelling of 2101123130221 in words is "two trillion, one hundred one billion, one hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".