210121212100211 has 12 divisors (see below), whose sum is σ = 224530692319080. Its totient is φ = 196091123231520.

The previous prime is 210121212100201. The next prime is 210121212100253. The reversal of 210121212100211 is 112001212121012.

It is not a de Polignac number, because 210121212100211 - 2²² = 210121207905907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210121212100211.

It is not an unprimeable number, because it can be changed into a prime (210121212100201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231704770 + ... + 1231875351.

It is an arithmetic number, because the mean of its divisors is an integer number (18710891026590).

Almost surely, 2^{210121212100211} is an apocalyptic number.

210121212100211 is a deficient number, since it is larger than the sum of its proper divisors (14409480218869).

210121212100211 is an equidigital number, since it uses as much as digits as its factorization.

210121212100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463580274 (or 2463580207 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210121212100211 its reverse (112001212121012), we get a palindrome (322122424221223).

The spelling of 210121212100211 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twelve million, one hundred thousand, two hundred eleven".