21122130234 has 16 divisors (see below), whose sum is σ = 42718916160. Its totient is φ = 6961600800.

The previous prime is 21122130229. The next prime is 21122130277. The reversal of 21122130234 is 43203122112.

It is a super-2 number, since 2×21122130234² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122130234.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19776742 + ... + 19777809.

It is an arithmetic number, because the mean of its divisors is an integer number (2669932260).

Almost surely, 2^21122130234 is an apocalyptic number.

21122130234 is an abundant number, since it is smaller than the sum of its proper divisors (21596785926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122130234 is a wasteful number, since it uses less digits than its factorization.

21122130234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39554645.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21122130234 its reverse (43203122112), we get a palindrome (64325252346).

The spelling of 21122130234 in words is "twenty-one billion, one hundred twenty-two million, one hundred thirty thousand, two hundred thirty-four".