21110021222202 has 24 divisors (see below), whose sum is σ = 49896413798400. Its totient is φ = 6396976127880.

The previous prime is 21110021222197. The next prime is 21110021222237. The reversal of 21110021222202 is 20222212001112.

It is a happy number.

21110021222202 is a `hidden beast` number, since 211 + 10 + 0 + 21 + 222 + 202 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53308134202 + ... + 53308134597.

It is an arithmetic number, because the mean of its divisors is an integer number (2079017241600).

Almost surely, 2^{21110021222202} is an apocalyptic number.

21110021222202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21110021222202 is an abundant number, since it is smaller than the sum of its proper divisors (28786392576198).

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

21110021222202 is a wasteful number, since it uses less digits than its factorization.

21110021222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106616268818 (or 106616268815 counting only the distinct ones).

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

Adding to 21110021222202 its reverse (20222212001112), we get a palindrome (41332233223314).

The spelling of 21110021222202 in words is "twenty-one trillion, one hundred ten billion, twenty-one million, two hundred twenty-two thousand, two hundred two".