21213555424132 has 6 divisors (see below), whose sum is σ = 37123721992238. Its totient is φ = 10606777712064.

The previous prime is 21213555424073. The next prime is 21213555424151. The reversal of 21213555424132 is 23142455531212.

It can be written as a sum of positive squares in only one way, i.e., 16841634068736 + 4371921355396 = 4103856^2 + 2090914^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651694428013 + ... + 2651694428020.

Almost surely, 2^{21213555424132} is an apocalyptic number.

It is an amenable number.

21213555424132 is a deficient number, since it is larger than the sum of its proper divisors (15910166568106).

21213555424132 is a wasteful number, since it uses less digits than its factorization.

21213555424132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303388856037 (or 5303388856035 counting only the distinct ones).

The product of its digits is 288000, while the sum is 40.

The spelling of 21213555424132 in words is "twenty-one trillion, two hundred thirteen billion, five hundred fifty-five million, four hundred twenty-four thousand, one hundred thirty-two".