21122031230 has 8 divisors (see below), whose sum is σ = 38019656232. Its totient is φ = 8448812488.

The previous prime is 21122031197. The next prime is 21122031277. The reversal of 21122031230 is 3213022112.

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

It is a super-2 number, since 2×21122031230² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122031199 and 21122031208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056101552 + ... + 1056101571.

It is an arithmetic number, because the mean of its divisors is an integer number (4752457029).

Almost surely, 2^21122031230 is an apocalyptic number.

21122031230 is a deficient number, since it is larger than the sum of its proper divisors (16897625002).

21122031230 is a wasteful number, since it uses less digits than its factorization.

21122031230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112203130.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21122031230 its reverse (3213022112), we get a palindrome (24335053342).

The spelling of 21122031230 in words is "twenty-one billion, one hundred twenty-two million, thirty-one thousand, two hundred thirty".