21232121262 has 32 divisors (see below), whose sum is σ = 46348896384. Its totient is φ = 6430605600.

The previous prime is 21232121257. The next prime is 21232121303. The reversal of 21232121262 is 26212123212.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44148 + ... + 210744.

It is an arithmetic number, because the mean of its divisors is an integer number (1448403012).

Almost surely, 2^21232121262 is an apocalyptic number.

21232121262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21232121262 is an abundant number, since it is smaller than the sum of its proper divisors (25116775122).

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

21232121262 is a wasteful number, since it uses less digits than its factorization.

21232121262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168544.

The product of its digits is 1152, while the sum is 24.

Adding to 21232121262 its reverse (26212123212), we get a palindrome (47444244474).

The spelling of 21232121262 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-one thousand, two hundred sixty-two".