211221221111002 has 8 divisors (see below), whose sum is σ = 327757067241300. Its totient is φ = 101968865363904.

The previous prime is 211221221110969. The next prime is 211221221111003. The reversal of 211221221111002 is 200111122122112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 208132587093601 + 3088634017401 = 14426801^2 + 1757451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211221221111002² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221221111003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820872595727 + ... + 1820872595842.

Almost surely, 2^{211221221111002} is an apocalyptic number.

211221221111002 is a deficient number, since it is larger than the sum of its proper divisors (116535846130298).

211221221111002 is a wasteful number, since it uses less digits than its factorization.

211221221111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641745191600.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211221221111002 its reverse (200111122122112), we get a palindrome (411332343233114).

The spelling of 211221221111002 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two".