1022111221999 has 8 divisors (see below), whose sum is σ = 1171258821920. Its totient is φ = 873746549856.

The previous prime is 1022111221951. The next prime is 1022111222039. The reversal of 1022111221999 is 9991221112201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1022111221999 - 2²¹ = 1022109124847 is a prime.

It is a super-2 number, since 2×1022111221999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022111221939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195729144 + ... + 195734365.

It is an arithmetic number, because the mean of its divisors is an integer number (146407352740).

Almost surely, 2^{1022111221999} is an apocalyptic number.

1022111221999 is a deficient number, since it is larger than the sum of its proper divisors (149147599921).

1022111221999 is an equidigital number, since it uses as much as digits as its factorization.

1022111221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391463889.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 1022111221999 in words is "one trillion, twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".