21012201001210 has 8 divisors (see below), whose sum is σ = 37821961802196. Its totient is φ = 8404880400480.

The previous prime is 21012201001117. The next prime is 21012201001247. The reversal of 21012201001210 is 1210010221012.

It can be written as a sum of positive squares in 2 ways, for example, as 17517481081321 + 3494719919889 = 4185389^2 + 1869417^2 .

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, 1050610050051 + ... + 1050610050070.

Almost surely, 2^{21012201001210} is an apocalyptic number.

21012201001210 is a deficient number, since it is larger than the sum of its proper divisors (16809760800986).

21012201001210 is a wasteful number, since it uses less digits than its factorization.

21012201001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101220100128.

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

Adding to 21012201001210 its reverse (1210010221012), we get a palindrome (22222211222222).

The spelling of 21012201001210 in words is "twenty-one trillion, twelve billion, two hundred one million, one thousand, two hundred ten".