1022121221099 has 24 divisors (see below), whose sum is σ = 1139773753776. Its totient is φ = 915752217600.

The previous prime is 1022121220999. The next prime is 1022121221111. The reversal of 1022121221099 is 9901221212201.

It is not a de Polignac number, because 1022121221099 - 2²⁸ = 1021852785643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022121229099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11358587 + ... + 11448219.

It is an arithmetic number, because the mean of its divisors is an integer number (47490573074).

Almost surely, 2^{1022121221099} is an apocalyptic number.

1022121221099 is a deficient number, since it is larger than the sum of its proper divisors (117652532677).

1022121221099 is a wasteful number, since it uses less digits than its factorization.

1022121221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91019 (or 91008 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

It can be divided in two parts, 1022 and 121221099, that added together give a palindrome (121222121).

The spelling of 1022121221099 in words is "one trillion, twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, ninety-nine".