221212200111002 has 16 divisors (see below), whose sum is σ = 339946862745672. Its totient is φ = 107919638948160.

The previous prime is 221212200110983. The next prime is 221212200111013. The reversal of 221212200111002 is 200111002212122.

It can be written as a sum of positive squares in 4 ways, for example, as 100652480870041 + 120559719240961 = 10032571^2 + 10979969^2 .

It is a super-2 number, since 2×221212200111002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5764918793 + ... + 5764957164.

Almost surely, 2^{221212200111002} is an apocalyptic number.

221212200111002 is a deficient number, since it is larger than the sum of its proper divisors (118734662634670).

221212200111002 is a wasteful number, since it uses less digits than its factorization.

221212200111002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11529876193.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221212200111002 its reverse (200111002212122), we get a palindrome (421323202323124).

The spelling of 221212200111002 in words is "two hundred twenty-one trillion, two hundred twelve billion, two hundred million, one hundred eleven thousand, two".