21100010002222 has 16 divisors (see below), whose sum is σ = 32392634676480. Its totient is φ = 10303426430968.

The previous prime is 21100010002139. The next prime is 21100010002241. The reversal of 21100010002222 is 22220001000112.

It is a happy number.

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, 240286072 + ... + 240373867.

It is an arithmetic number, because the mean of its divisors is an integer number (2024539667280).

Almost surely, 2^{21100010002222} is an apocalyptic number.

21100010002222 is a deficient number, since it is larger than the sum of its proper divisors (11292624674258).

21100010002222 is a wasteful number, since it uses less digits than its factorization.

21100010002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480660455.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21100010002222 its reverse (22220001000112), we get a palindrome (43320011002334).

The spelling of 21100010002222 in words is "twenty-one trillion, one hundred billion, ten million, two thousand, two hundred twenty-two".