22121210460 has 48 divisors (see below), whose sum is σ = 62232976512. Its totient is φ = 5871028800.

The previous prime is 22121210459. The next prime is 22121210467. The reversal of 22121210460 is 6401212122.

It is a super-2 number, since 2×22121210460² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121210467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861006 + ... + 886325.

It is an arithmetic number, because the mean of its divisors is an integer number (1296520344).

Almost surely, 2^22121210460 is an apocalyptic number.

22121210460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121210460 is an abundant number, since it is smaller than the sum of its proper divisors (40111766052).

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

22121210460 is a wasteful number, since it uses less digits than its factorization.

22121210460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747554 (or 1747552 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 22121210460 its reverse (6401212122), we get a palindrome (28522422582).

The spelling of 22121210460 in words is "twenty-two billion, one hundred twenty-one million, two hundred ten thousand, four hundred sixty".