21086021202 has 8 divisors (see below), whose sum is σ = 42172042416. Its totient is φ = 7028673732.

The previous prime is 21086021171. The next prime is 21086021207. The reversal of 21086021202 is 20212068012.

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

21086021202 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21086021207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757168428 + ... + 1757168439.

It is an arithmetic number, because the mean of its divisors is an integer number (5271505302).

Almost surely, 2^21086021202 is an apocalyptic number.

21086021202 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21086021202 is a wasteful number, since it uses less digits than its factorization.

21086021202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514336872.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21086021202 its reverse (20212068012), we get a palindrome (41298089214).

The spelling of 21086021202 in words is "twenty-one billion, eighty-six million, twenty-one thousand, two hundred two".