21214232202602 has 4 divisors (see below), whose sum is σ = 31821348303906. Its totient is φ = 10607116101300.

The previous prime is 21214232202587. The next prime is 21214232202607. The reversal of 21214232202602 is 20620223241212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18257170211281 + 2957061991321 = 4272841^2 + 1719611^2 .

It is not an unprimeable number, because it can be changed into a prime (21214232202607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303558050649 + ... + 5303558050652.

Almost surely, 2^{21214232202602} is an apocalyptic number.

21214232202602 is a deficient number, since it is larger than the sum of its proper divisors (10607116101304).

21214232202602 is a wasteful number, since it uses less digits than its factorization.

21214232202602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10607116101303.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21214232202602 its reverse (20620223241212), we get a palindrome (41834455443814).

The spelling of 21214232202602 in words is "twenty-one trillion, two hundred fourteen billion, two hundred thirty-two million, two hundred two thousand, six hundred two".