1221222122092 has 48 divisors (see below), whose sum is σ = 2548989273600. Its totient is φ = 500556114432.

The previous prime is 1221222122077. The next prime is 1221222122117. The reversal of 1221222122092 is 2902212221221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1221222122092.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4675159 + ... + 4929457.

It is an arithmetic number, because the mean of its divisors is an integer number (53103943200).

Almost surely, 2^{1221222122092} is an apocalyptic number.

It is an amenable number.

1221222122092 is an abundant number, since it is smaller than the sum of its proper divisors (1327767151508).

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

1221222122092 is a wasteful number, since it uses less digits than its factorization.

1221222122092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261790 (or 261788 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 1221222122092 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, ninety-two".