21000102202 has 16 divisors (see below), whose sum is σ = 31818332520. Its totient is φ = 10394513152.

The previous prime is 21000102197. The next prime is 21000102223. The reversal of 21000102202 is 20220100012.

It can be written as a sum of positive squares in 4 ways, for example, as 14518081081 + 6482021121 = 120491^2 + 80511^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49627 + ... + 210862.

Almost surely, 2^21000102202 is an apocalyptic number.

21000102202 is a deficient number, since it is larger than the sum of its proper divisors (10818230318).

21000102202 is a wasteful number, since it uses less digits than its factorization.

21000102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260897.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21000102202 its reverse (20220100012), we get a palindrome (41220202214).

The spelling of 21000102202 in words is "twenty-one billion, one hundred two thousand, two hundred two".