21110100222212 has 24 divisors (see below), whose sum is σ = 38549141459136. Its totient is φ = 10096066062368.

The previous prime is 21110100222187. The next prime is 21110100222221. The reversal of 21110100222212 is 21222200101112.

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, 14374283 + ... + 15774669.

It is an arithmetic number, because the mean of its divisors is an integer number (1606214227464).

Almost surely, 2^{21110100222212} is an apocalyptic number.

It is an amenable number.

21110100222212 is a deficient number, since it is larger than the sum of its proper divisors (17439041236924).

21110100222212 is a wasteful number, since it uses less digits than its factorization.

21110100222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564267 (or 1564265 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21110100222212 its reverse (21222200101112), we get a palindrome (42332300323324).

The spelling of 21110100222212 in words is "twenty-one trillion, one hundred ten billion, one hundred million, two hundred twenty-two thousand, two hundred twelve".