1221000011122 has 16 divisors (see below), whose sum is σ = 1942074639072. Its totient is φ = 573746958400.

The previous prime is 1221000011117. The next prime is 1221000011131. The reversal of 1221000011122 is 2211100001221.

It is a super-3 number, since 3×1221000011122³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26266504 + ... + 26312947.

It is an arithmetic number, because the mean of its divisors is an integer number (121379664942).

Almost surely, 2^{1221000011122} is an apocalyptic number.

1221000011122 is a deficient number, since it is larger than the sum of its proper divisors (721074627950).

1221000011122 is a wasteful number, since it uses less digits than its factorization.

1221000011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52580153.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1221000011122 its reverse (2211100001221), we get a palindrome (3432100012343).

Subtracting 1221000011122 from its reverse (2211100001221), we obtain a palindrome (990099990099).

The spelling of 1221000011122 in words is "one trillion, two hundred twenty-one billion, eleven thousand, one hundred twenty-two".