1121021101999 has 16 divisors (see below), whose sum is σ = 1196464089600. Its totient is φ = 1048013476576.

The previous prime is 1121021101987. The next prime is 1121021102029. The reversal of 1121021101999 is 9991011201211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121021101999 is a prime.

It is a super-2 number, since 2×1121021101999² (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 (1121021101909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2152819 + ... + 2622340.

It is an arithmetic number, because the mean of its divisors is an integer number (74779005600).

Almost surely, 2^{1121021101999} is an apocalyptic number.

1121021101999 is a deficient number, since it is larger than the sum of its proper divisors (75442987601).

1121021101999 is a wasteful number, since it uses less digits than its factorization.

1121021101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775414.

The product of its (nonzero) digits is 2916, while the sum is 37.

The spelling of 1121021101999 in words is "one trillion, one hundred twenty-one billion, twenty-one million, one hundred one thousand, nine hundred ninety-nine".