221211211120002 has 24 divisors (see below), whose sum is σ = 479291234976684. Its totient is φ = 73737027673344.

The previous prime is 221211211119991. The next prime is 221211211120013. The reversal of 221211211120002 is 200021112112122.

221211211120002 is a `hidden beast` number, since 221 + 211 + 21 + 11 + 200 + 0 + 2 = 666.

221211211120002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221211211119991) and next prime (221211211120013).

It can be written as a sum of positive squares in 2 ways, for example, as 132406239117681 + 88804972002321 = 11506791^2 + 9423639^2 .

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, 50983978 + ... + 55152410.

Almost surely, 2^{221211211120002} is an apocalyptic number.

221211211120002 is an abundant number, since it is smaller than the sum of its proper divisors (258080023856682).

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

221211211120002 is a wasteful number, since it uses less digits than its factorization.

221211211120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116674 (or 7116671 counting only the distinct ones).

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

Adding to 221211211120002 its reverse (200021112112122), we get a palindrome (421232323232124).

The spelling of 221211211120002 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty thousand, two".