21271402132 has 12 divisors (see below), whose sum is σ = 37412015200. Its totient is φ = 10582254936.

The previous prime is 21271402129. The next prime is 21271402169. The reversal of 21271402132 is 23120417212.

It is a super-2 number, since 2×21271402132² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21271402097 and 21271402106.

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, 13360638 + ... + 13362229.

Almost surely, 2^21271402132 is an apocalyptic number.

It is an amenable number.

21271402132 is a deficient number, since it is larger than the sum of its proper divisors (16140613068).

21271402132 is a wasteful number, since it uses less digits than its factorization.

21271402132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26723070 (or 26723068 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 21271402132 its reverse (23120417212), we get a palindrome (44391819344).

The spelling of 21271402132 in words is "twenty-one billion, two hundred seventy-one million, four hundred two thousand, one hundred thirty-two".