22121100210021 has 8 divisors (see below), whose sum is σ = 29510514086304. Its totient is φ = 14739543236880.

The previous prime is 22121100210007. The next prime is 22121100210049. The reversal of 22121100210021 is 12001200112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22121100210021 - 2¹⁰ = 22121100208997 is a prime.

It is a super-2 number, since 2×22121100210021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121100210221) 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, 1964219215 + ... + 1964230476.

It is an arithmetic number, because the mean of its divisors is an integer number (3688814260788).

Almost surely, 2^{22121100210021} is an apocalyptic number.

It is an amenable number.

22121100210021 is a deficient number, since it is larger than the sum of its proper divisors (7389413876283).

22121100210021 is a wasteful number, since it uses less digits than its factorization.

22121100210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928451571.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121100210021 its reverse (12001200112122), we get a palindrome (34122300322143).

The spelling of 22121100210021 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred million, two hundred ten thousand, twenty-one".