221121210022002 has 12 divisors (see below), whose sum is σ = 479095955047710. Its totient is φ = 73707070007328.

The previous prime is 221121210021997. The next prime is 221121210022019. The reversal of 221121210022002 is 200220012121122.

It is a happy number.

221121210022002 is a `hidden beast` number, since 2 + 211 + 21 + 210 + 0 + 220 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200217943725921 + 20903266296081 = 14149839^2 + 4572009^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12284511667889 = 221121210022002 / (2 + 2 + 1 + 1 + 2 + 1 + 2 + 1 + 0 + 0 + 2 + 2 + 0 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6142255833927 + ... + 6142255833962.

Almost surely, 2^{221121210022002} is an apocalyptic number.

221121210022002 is an abundant number, since it is smaller than the sum of its proper divisors (257974745025708).

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

221121210022002 is a wasteful number, since it uses less digits than its factorization.

221121210022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12284511667897 (or 12284511667894 counting only the distinct ones).

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

Adding to 221121210022002 its reverse (200220012121122), we get a palindrome (421341222143124).

The spelling of 221121210022002 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, twenty-two thousand, two".