21110222212002 has 64 divisors (see below), whose sum is σ = 58487195750400. Its totient is φ = 5483174599440.

The previous prime is 21110222211989. The next prime is 21110222212061. The reversal of 21110222212002 is 20021222201112.

It is a happy number.

21110222212002 is a `hidden beast` number, since 211 + 10 + 22 + 221 + 200 + 2 = 666.

It is a super-2 number, since 2×21110222212002² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2538502602 + ... + 2538510917.

It is an arithmetic number, because the mean of its divisors is an integer number (913862433600).

Almost surely, 2^{21110222212002} is an apocalyptic number.

21110222212002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21110222212002 is an abundant number, since it is smaller than the sum of its proper divisors (37376973538398).

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

21110222212002 is a wasteful number, since it uses less digits than its factorization.

21110222212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077013548 (or 5077013542 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21110222212002 its reverse (20021222201112), we get a palindrome (41131444413114).

The spelling of 21110222212002 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, two hundred twelve thousand, two".