21213032202 has 12 divisors (see below), whose sum is σ = 45961569810. Its totient is φ = 7071010728.

The previous prime is 21213032179. The next prime is 21213032219. The reversal of 21213032202 is 20223031212.

21213032202 is a `hidden beast` number, since 212 + 130 + 322 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16871671881 + 4341360321 = 129891^2 + 65889^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1178501789 = 21213032202 / (2 + 1 + 2 + 1 + 3 + 0 + 3 + 2 + 2 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589250877 + ... + 589250912.

Almost surely, 2^21213032202 is an apocalyptic number.

21213032202 is an abundant number, since it is smaller than the sum of its proper divisors (24748537608).

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

21213032202 is a wasteful number, since it uses less digits than its factorization.

21213032202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178501797 (or 1178501794 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21213032202 its reverse (20223031212), we get a palindrome (41436063414).

The spelling of 21213032202 in words is "twenty-one billion, two hundred thirteen million, thirty-two thousand, two hundred two".