21122010237 has 8 divisors (see below), whose sum is σ = 28163470720. Its totient is φ = 14080944960.

The previous prime is 21122010223. The next prime is 21122010241. The reversal of 21122010237 is 73201022112.

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

It is not a de Polignac number, because 21122010237 - 2⁷ = 21122010109 is a prime.

It is a super-2 number, since 2×21122010237² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122010277) 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, 64437 + ... + 215397.

It is an arithmetic number, because the mean of its divisors is an integer number (3520433840).

Almost surely, 2^21122010237 is an apocalyptic number.

It is an amenable number.

21122010237 is a deficient number, since it is larger than the sum of its proper divisors (7041460483).

21122010237 is a wasteful number, since it uses less digits than its factorization.

21122010237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197603.

The product of its (nonzero) digits is 336, while the sum is 21.

Adding to 21122010237 its reverse (73201022112), we get a palindrome (94323032349).

The spelling of 21122010237 in words is "twenty-one billion, one hundred twenty-two million, ten thousand, two hundred thirty-seven".