21132210121 has 8 divisors (see below), whose sum is σ = 23589444384. Its totient is φ = 18764329920.

The previous prime is 21132210101. The next prime is 21132210139. The reversal of 21132210121 is 12101223112.

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 21132210121 - 2⁷ = 21132209993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21132210095 and 21132210104.

It is not an unprimeable number, because it can be changed into a prime (21132210101) 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, 22338016 + ... + 22338961.

It is an arithmetic number, because the mean of its divisors is an integer number (2948680548).

Almost surely, 2^21132210121 is an apocalyptic number.

It is an amenable number.

21132210121 is a deficient number, since it is larger than the sum of its proper divisors (2457234263).

21132210121 is a wasteful number, since it uses less digits than its factorization.

21132210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44677031.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21132210121 its reverse (12101223112), we get a palindrome (33233433233).

The spelling of 21132210121 in words is "twenty-one billion, one hundred thirty-two million, two hundred ten thousand, one hundred twenty-one".