210121100021110 has 8 divisors (see below), whose sum is σ = 378217980038016. Its totient is φ = 84048440008440.

The previous prime is 210121100021059. The next prime is 210121100021113. The reversal of 210121100021110 is 11120001121012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121100021113) 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, 10506055001046 + ... + 10506055001065.

It is an arithmetic number, because the mean of its divisors is an integer number (47277247504752).

Almost surely, 2^{210121100021110} is an apocalyptic number.

210121100021110 is a deficient number, since it is larger than the sum of its proper divisors (168096880016906).

210121100021110 is a wasteful number, since it uses less digits than its factorization.

210121100021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012110002118.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210121100021110 its reverse (11120001121012), we get a palindrome (221241101142122).

The spelling of 210121100021110 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred million, twenty-one thousand, one hundred ten".