21201021202 has 8 divisors (see below), whose sum is σ = 31804096896. Its totient is φ = 10599655572.

The previous prime is 21201021173. The next prime is 21201021211. The reversal of 21201021202 is 20212010212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 396058 + ... + 446389.

It is an arithmetic number, because the mean of its divisors is an integer number (3975512112).

Almost surely, 2^21201021202 is an apocalyptic number.

21201021202 is a deficient number, since it is larger than the sum of its proper divisors (10603075694).

21201021202 is a wasteful number, since it uses less digits than its factorization.

21201021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855032.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21201021202 its reverse (20212010212), we get a palindrome (41413031414).

The spelling of 21201021202 in words is "twenty-one billion, two hundred one million, twenty-one thousand, two hundred two".