21010202011210 has 8 divisors (see below), whose sum is σ = 37818363620196. Its totient is φ = 8404080804480.

The previous prime is 21010202011157. The next prime is 21010202011231. The reversal of 21010202011210 is 1211020201012.

It can be written as a sum of positive squares in 2 ways, for example, as 20320450168041 + 689751843169 = 4507821^2 + 830513^2 .

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, 1050510100551 + ... + 1050510100570.

Almost surely, 2^{21010202011210} is an apocalyptic number.

21010202011210 is a deficient number, since it is larger than the sum of its proper divisors (16808161608986).

21010202011210 is a wasteful number, since it uses less digits than its factorization.

21010202011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101020201128.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21010202011210 its reverse (1211020201012), we get a palindrome (22221222212222).

The spelling of 21010202011210 in words is "twenty-one trillion, ten billion, two hundred two million, eleven thousand, two hundred ten".