210202112100021 has 8 divisors (see below), whose sum is σ = 280269964056384. Its totient is φ = 140134500771840.

The previous prime is 210202112099921. The next prime is 210202112100107. The reversal of 210202112100021 is 120001211202012.

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

It is not a de Polignac number, because 210202112100021 - 2¹⁵ = 210202112067253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202112100521) 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, 58108785 + ... + 61620086.

It is an arithmetic number, because the mean of its divisors is an integer number (35033745507048).

Almost surely, 2^{210202112100021} is an apocalyptic number.

It is an amenable number.

210202112100021 is a deficient number, since it is larger than the sum of its proper divisors (70067851956363).

210202112100021 is a wasteful number, since it uses less digits than its factorization.

210202112100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120314091.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210202112100021 its reverse (120001211202012), we get a palindrome (330203323302033).

The spelling of 210202112100021 in words is "two hundred ten trillion, two hundred two billion, one hundred twelve million, one hundred thousand, twenty-one".