21310032210121 has 4 divisors (see below), whose sum is σ = 21310579235200. Its totient is φ = 21309485185044.

The previous prime is 21310032210113. The next prime is 21310032210227. The reversal of 21310032210121 is 12101223001312.

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 21310032210121 - 2³ = 21310032210113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21310332210121) 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, 273454101 + ... + 273532018.

It is an arithmetic number, because the mean of its divisors is an integer number (5327644808800).

Almost surely, 2^{21310032210121} is an apocalyptic number.

It is an amenable number.

21310032210121 is a deficient number, since it is larger than the sum of its proper divisors (547025079).

21310032210121 is an equidigital number, since it uses as much as digits as its factorization.

21310032210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547025078.

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

Adding to 21310032210121 its reverse (12101223001312), we get a palindrome (33411255211433).

The spelling of 21310032210121 in words is "twenty-one trillion, three hundred ten billion, thirty-two million, two hundred ten thousand, one hundred twenty-one".