221101121122012 has 24 divisors (see below), whose sum is σ = 387631815852960. Its totient is φ = 110349256610880.

The previous prime is 221101121121983. The next prime is 221101121122181. The reversal of 221101121122012 is 210221121101122.

It is a happy number.

It is a super-2 number, since 2×221101121122012² (a number of 29 digits) contains 22 as substring.

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, 316998 + ... + 21030994.

It is an arithmetic number, because the mean of its divisors is an integer number (16151325660540).

Almost surely, 2^{221101121122012} is an apocalyptic number.

It is an amenable number.

221101121122012 is a deficient number, since it is larger than the sum of its proper divisors (166530694730948).

221101121122012 is a wasteful number, since it uses less digits than its factorization.

221101121122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20718861 (or 20718859 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221101121122012 its reverse (210221121101122), we get a palindrome (431322242223134).

The spelling of 221101121122012 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, twelve".