21000212020210 has 8 divisors (see below), whose sum is σ = 37800381636396. Its totient is φ = 8400084808080.

The previous prime is 21000212020141. The next prime is 21000212020211. The reversal of 21000212020210 is 1202021200012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18475700965569 + 2524511054641 = 4298337^2 + 1588871^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21000212020211) 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, 1050010601001 + ... + 1050010601020.

Almost surely, 2^{21000212020210} is an apocalyptic number.

21000212020210 is a deficient number, since it is larger than the sum of its proper divisors (16800169616186).

21000212020210 is a wasteful number, since it uses less digits than its factorization.

21000212020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100021202028.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21000212020210 its reverse (1202021200012), we get a palindrome (22202233220222).

The spelling of 21000212020210 in words is "twenty-one trillion, two hundred twelve million, twenty thousand, two hundred ten".