210202101100021 has 8 divisors (see below), whose sum is σ = 210250601385984. Its totient is φ = 210153606060720.

The previous prime is 210202101100001. The next prime is 210202101100063. The reversal of 210202101100021 is 120001101202012.

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

It is a cyclic number.

It is not a de Polignac number, because 210202101100021 - 2¹⁵ = 210202101067253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210202101099974 and 210202101100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202101100001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79397376 + ... + 82002118.

It is an arithmetic number, because the mean of its divisors is an integer number (26281325173248).

Almost surely, 2^{210202101100021} is an apocalyptic number.

It is an amenable number.

210202101100021 is a deficient number, since it is larger than the sum of its proper divisors (48500285963).

210202101100021 is a wasteful number, since it uses less digits than its factorization.

210202101100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2623331.

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

Adding to 210202101100021 its reverse (120001101202012), we get a palindrome (330203202302033).

The spelling of 210202101100021 in words is "two hundred ten trillion, two hundred two billion, one hundred one million, one hundred thousand, twenty-one".