210102122221221 has 16 divisors (see below), whose sum is σ = 292360597306560. Its totient is φ = 134041349863680.

The previous prime is 210102122221217. The next prime is 210102122221223. The reversal of 210102122221221 is 122122221201012.

It is not a de Polignac number, because 210102122221221 - 2² = 210102122221217 is a prime.

It is a super-2 number, since 2×210102122221221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102122221223) 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, 10685684515 + ... + 10685704176.

It is an arithmetic number, because the mean of its divisors is an integer number (18272537331660).

Almost surely, 2^{210102122221221} is an apocalyptic number.

It is an amenable number.

210102122221221 is a deficient number, since it is larger than the sum of its proper divisors (82258475085339).

210102122221221 is a wasteful number, since it uses less digits than its factorization.

210102122221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21371388836.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 210102122221221 its reverse (122122221201012), we get a palindrome (332224343422233).

The spelling of 210102122221221 in words is "two hundred ten trillion, one hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".