221101210100212 has 48 divisors (see below), whose sum is σ = 453746724681600. Its totient is φ = 93342183338880.

The previous prime is 221101210100207. The next prime is 221101210100233. The reversal of 221101210100212 is 212001012101122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3858361864 + ... + 3858419167.

It is an arithmetic number, because the mean of its divisors is an integer number (9453056764200).

Almost surely, 2^{221101210100212} is an apocalyptic number.

It is an amenable number.

221101210100212 is an abundant number, since it is smaller than the sum of its proper divisors (232645514581388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221101210100212 is a wasteful number, since it uses less digits than its factorization.

221101210100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7716781096 (or 7716781094 counting only the distinct ones).

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

Adding to 221101210100212 its reverse (212001012101122), we get a palindrome (433102222201334).

The spelling of 221101210100212 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred ten million, one hundred thousand, two hundred twelve".