2123101300021 has 8 divisors (see below), whose sum is σ = 2289023885624. Its totient is φ = 1957551157440.

The previous prime is 2123101300009. The next prime is 2123101300049. The reversal of 2123101300021 is 1200031013212.

It can be written as a sum of positive squares in 4 ways, for example, as 1018563359121 + 1104537940900 = 1009239^2 + 1050970^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123101300021 - 2¹⁵ = 2123101267253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101299968 and 2123101300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123101300921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93098910 + ... + 93121711.

It is an arithmetic number, because the mean of its divisors is an integer number (286127985703).

Almost surely, 2^{2123101300021} is an apocalyptic number.

It is an amenable number.

2123101300021 is a deficient number, since it is larger than the sum of its proper divisors (165922585603).

2123101300021 is a wasteful number, since it uses less digits than its factorization.

2123101300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186221511.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 2123101300021 its reverse (1200031013212), we get a palindrome (3323132313233).

The spelling of 2123101300021 in words is "two trillion, one hundred twenty-three billion, one hundred one million, three hundred thousand, twenty-one".