21021001100210 has 16 divisors (see below), whose sum is σ = 37837859524416. Its totient is φ = 8408387652528.

The previous prime is 21021001100191. The next prime is 21021001100249. The reversal of 21021001100210 is 1200110012012.

It is a junction number, because it is equal to n+sod(n) for n = 21021001100191 and 21021001100200.

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, 8118749 + ... + 10390191.

It is an arithmetic number, because the mean of its divisors is an integer number (2364866220276).

Almost surely, 2^{21021001100210} is an apocalyptic number.

21021001100210 is a deficient number, since it is larger than the sum of its proper divisors (16816858424206).

21021001100210 is a wasteful number, since it uses less digits than its factorization.

21021001100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196897.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21021001100210 its reverse (1200110012012), we get a palindrome (22221111112222).

The spelling of 21021001100210 in words is "twenty-one trillion, twenty-one billion, one million, one hundred thousand, two hundred ten".