1212221002111 has 16 divisors (see below), whose sum is σ = 1406499614208. Its totient is φ = 1023251594400.

The previous prime is 1212221002093. The next prime is 1212221002117. The reversal of 1212221002111 is 1112001222121.

It is not a de Polignac number, because 1212221002111 - 2⁷ = 1212221001983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221002117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942280 + ... + 1819981.

It is an arithmetic number, because the mean of its divisors is an integer number (87906225888).

Almost surely, 2^{1212221002111} is an apocalyptic number.

1212221002111 is a deficient number, since it is larger than the sum of its proper divisors (194278612097).

1212221002111 is an equidigital number, since it uses as much as digits as its factorization.

1212221002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763222.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212221002111 its reverse (1112001222121), we get a palindrome (2324222224232).

The spelling of 1212221002111 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two thousand, one hundred eleven".