221211121120002 has 64 divisors (see below), whose sum is σ = 532641953074560. Its totient is φ = 67647383865792.

The previous prime is 221211121119983. The next prime is 221211121120007. The reversal of 221211121120002 is 200021121112122.

221211121120002 is a `hidden beast` number, since 221 + 21 + 11 + 211 + 200 + 0 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (221211121120007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966497713 + ... + 966726564.

It is an arithmetic number, because the mean of its divisors is an integer number (8322530516790).

Almost surely, 2^{221211121120002} is an apocalyptic number.

221211121120002 is an abundant number, since it is smaller than the sum of its proper divisors (311430831954558).

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

221211121120002 is a wasteful number, since it uses less digits than its factorization.

221211121120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933224464 (or 1933224458 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221211121120002 its reverse (200021121112122), we get a palindrome (421232242232124).

The spelling of 221211121120002 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty thousand, two".