210010012121221 has 16 divisors (see below), whose sum is σ = 236003102286336. Its totient is φ = 185422791730176.

The previous prime is 210010012121213. The next prime is 210010012121279. The reversal of 210010012121221 is 122121210010012.

It is not a de Polignac number, because 210010012121221 - 2³ = 210010012121213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210010012121195 and 210010012121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210010012121201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5774821 + ... + 21292453.

It is an arithmetic number, because the mean of its divisors is an integer number (14750193892896).

Almost surely, 2^{210010012121221} is an apocalyptic number.

It is an amenable number.

210010012121221 is a deficient number, since it is larger than the sum of its proper divisors (25993090165115).

210010012121221 is a wasteful number, since it uses less digits than its factorization.

210010012121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15562932.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210010012121221 its reverse (122121210010012), we get a palindrome (332131222131233).

The spelling of 210010012121221 in words is "two hundred ten trillion, ten billion, twelve million, one hundred twenty-one thousand, two hundred twenty-one".