2100123132321 has 8 divisors (see below), whose sum is σ = 2800253487744. Its totient is φ = 1400037432560.

The previous prime is 2100123132313. The next prime is 2100123132323. The reversal of 2100123132321 is 1232313210012.

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 2100123132321 - 2³ = 2100123132313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100123132323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11054025 + ... + 11242406.

It is an arithmetic number, because the mean of its divisors is an integer number (350031685968).

Almost surely, 2^{2100123132321} is an apocalyptic number.

It is an amenable number.

2100123132321 is a deficient number, since it is larger than the sum of its proper divisors (700130355423).

2100123132321 is a wasteful number, since it uses less digits than its factorization.

2100123132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22327831.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 2100123132321 its reverse (1232313210012), we get a palindrome (3332436342333).

The spelling of 2100123132321 in words is "two trillion, one hundred billion, one hundred twenty-three million, one hundred thirty-two thousand, three hundred twenty-one".