221110010101212 has 24 divisors (see below), whose sum is σ = 515974749091200. Its totient is φ = 73695994959216.

The previous prime is 221110010101177. The next prime is 221110010101223. The reversal of 221110010101212 is 212101010011122.

It is a happy number.

It is a super-4 number, since 4×221110010101212⁴ (a number of 58 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221110010101191 and 221110010101200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917592162 + ... + 917833097.

It is an arithmetic number, because the mean of its divisors is an integer number (21498947878800).

Almost surely, 2^{221110010101212} is an apocalyptic number.

It is an amenable number.

221110010101212 is an abundant number, since it is smaller than the sum of its proper divisors (294864738989988).

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

221110010101212 is a wasteful number, since it uses less digits than its factorization.

221110010101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835435305 (or 1835435303 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110010101212 its reverse (212101010011122), we get a palindrome (433211020112334).

The spelling of 221110010101212 in words is "two hundred twenty-one trillion, one hundred ten billion, ten million, one hundred one thousand, two hundred twelve".