2123100323021 has 4 divisors (see below), whose sum is σ = 2153003144544. Its totient is φ = 2093197501500.

The previous prime is 2123100323017. The next prime is 2123100323087. The reversal of 2123100323021 is 1203230013212.

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 2123100323021 - 2² = 2123100323017 is a prime.

It is a super-2 number, since 2×2123100323021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123100322984 and 2123100323002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123100323221) 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, 14951410655 + ... + 14951410796.

It is an arithmetic number, because the mean of its divisors is an integer number (538250786136).

Almost surely, 2^{2123100323021} is an apocalyptic number.

It is an amenable number.

2123100323021 is a deficient number, since it is larger than the sum of its proper divisors (29902821523).

2123100323021 is an equidigital number, since it uses as much as digits as its factorization.

2123100323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29902821522.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 2123100323021 its reverse (1203230013212), we get a palindrome (3326330336233).

The spelling of 2123100323021 in words is "two trillion, one hundred twenty-three billion, one hundred million, three hundred twenty-three thousand, twenty-one".