1212221122399 has 64 divisors (see below), whose sum is σ = 1540217935872. Its totient is φ = 930308198400.

The previous prime is 1212221122309. The next prime is 1212221122423. The reversal of 1212221122399 is 9932211222121.

It is not a de Polignac number, because 1212221122399 - 2¹¹ = 1212221120351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212221122309) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 132377329 + ... + 132386485.

It is an arithmetic number, because the mean of its divisors is an integer number (24065905248).

Almost surely, 2^{1212221122399} is an apocalyptic number.

1212221122399 is a deficient number, since it is larger than the sum of its proper divisors (327996813473).

1212221122399 is a wasteful number, since it uses less digits than its factorization.

1212221122399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896.

The product of its digits is 15552, while the sum is 37.

The spelling of 1212221122399 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, three hundred ninety-nine".