21211425132 has 24 divisors (see below), whose sum is σ = 49498680000. Its totient is φ = 7069710096.

The previous prime is 21211425127. The next prime is 21211425139. The reversal of 21211425132 is 23152411212.

It is a happy number.

It is a super-2 number, since 2×21211425132² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211425139) 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, 26119 + ... + 207617.

It is an arithmetic number, because the mean of its divisors is an integer number (2062445000).

Almost surely, 2^21211425132 is an apocalyptic number.

It is an amenable number.

21211425132 is an abundant number, since it is smaller than the sum of its proper divisors (28287254868).

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

21211425132 is a wasteful number, since it uses less digits than its factorization.

21211425132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191245 (or 191243 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

Adding to 21211425132 its reverse (23152411212), we get a palindrome (44363836344).

The spelling of 21211425132 in words is "twenty-one billion, two hundred eleven million, four hundred twenty-five thousand, one hundred thirty-two".