21101001202 has 8 divisors (see below), whose sum is σ = 31712254812. Its totient is φ = 10530249600.

The previous prime is 21101001197. The next prime is 21101001253. The reversal of 21101001202 is 20210010112.

It can be written as a sum of positive squares in 2 ways, for example, as 17628138441 + 3472862761 = 132771^2 + 58931^2 .

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, 10124199 + ... + 10126282.

Almost surely, 2^21101001202 is an apocalyptic number.

21101001202 is a deficient number, since it is larger than the sum of its proper divisors (10611253610).

21101001202 is a wasteful number, since it uses less digits than its factorization.

21101001202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20251004.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21101001202 its reverse (20210010112), we get a palindrome (41311011314).

The spelling of 21101001202 in words is "twenty-one billion, one hundred one million, one thousand, two hundred two".