2100232112021 has 4 divisors (see below), whose sum is σ = 2223775177452. Its totient is φ = 1976689046592.

The previous prime is 2100232111981. The next prime is 2100232112023. The reversal of 2100232112021 is 1202112320012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1821727881796 + 278504230225 = 1349714^2 + 527735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100232112021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 123543065413 = 2100232112021 / (2 + 1 + 0 + 0 + 2 + 3 + 2 + 1 + 1 + 2 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100232112023) 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, 61771532690 + ... + 61771532723.

It is an arithmetic number, because the mean of its divisors is an integer number (555943794363).

Almost surely, 2^{2100232112021} is an apocalyptic number.

It is an amenable number.

2100232112021 is a deficient number, since it is larger than the sum of its proper divisors (123543065431).

2100232112021 is a wasteful number, since it uses less digits than its factorization.

2100232112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123543065430.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2100232112021 its reverse (1202112320012), we get a palindrome (3302344432033).

The spelling of 2100232112021 in words is "two trillion, one hundred billion, two hundred thirty-two million, one hundred twelve thousand, twenty-one".