21022140121 has 8 divisors (see below), whose sum is σ = 21190107200. Its totient is φ = 20854551600.

The previous prime is 21022140089. The next prime is 21022140157. The reversal of 21022140121 is 12104122012.

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 21022140121 - 2⁵ = 21022140089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022140095 and 21022140104.

It is not an unprimeable number, because it can be changed into a prime (21022140221) 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, 17395 + ... + 205783.

It is an arithmetic number, because the mean of its divisors is an integer number (2648763400).

Almost surely, 2^21022140121 is an apocalyptic number.

It is an amenable number.

21022140121 is a deficient number, since it is larger than the sum of its proper divisors (167967079).

21022140121 is a wasteful number, since it uses less digits than its factorization.

21022140121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189279.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21022140121 its reverse (12104122012), we get a palindrome (33126262133).

The spelling of 21022140121 in words is "twenty-one billion, twenty-two million, one hundred forty thousand, one hundred twenty-one".