21000110222212 has 48 divisors (see below), whose sum is σ = 40600462694400. Its totient is φ = 9424243539360.

The previous prime is 21000110222141. The next prime is 21000110222237. The reversal of 21000110222212 is 21222201100012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82876903 + ... + 83129905.

It is an arithmetic number, because the mean of its divisors is an integer number (845842972800).

Almost surely, 2^{21000110222212} is an apocalyptic number.

21000110222212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000110222212 is a deficient number, since it is larger than the sum of its proper divisors (19600352472188).

21000110222212 is a wasteful number, since it uses less digits than its factorization.

21000110222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276976 (or 276974 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21000110222212 its reverse (21222201100012), we get a palindrome (42222311322224).

The spelling of 21000110222212 in words is "twenty-one trillion, one hundred ten million, two hundred twenty-two thousand, two hundred twelve".