211221211120002 has 24 divisors (see below), whose sum is σ = 484566307864236. Its totient is φ = 66265477998336.

The previous prime is 211221211119983. The next prime is 211221211120021. The reversal of 211221211120002 is 200021112122112.

211221211120002 is a `hidden beast` number, since 211 + 221 + 21 + 11 + 200 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (211221211119983) and next prime (211221211120021).

It can be written as a sum of positive squares in 2 ways, for example, as 199082251341801 + 12138959778201 = 14109651^2 + 3484101^2 .

It is a super-2 number, since 2×211221211120002² (a number of 29 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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345132697603 + ... + 345132698214.

Almost surely, 2^{211221211120002} is an apocalyptic number.

211221211120002 is an abundant number, since it is smaller than the sum of its proper divisors (273345096744234).

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

211221211120002 is a wasteful number, since it uses less digits than its factorization.

211221211120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690265395842 (or 690265395839 counting only the distinct ones).

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

Adding to 211221211120002 its reverse (200021112122112), we get a palindrome (411242323242114).

The spelling of 211221211120002 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, two".