1100121993 has 24 divisors (see below), whose sum is σ = 1719576768. Its totient is φ = 701523504.

The previous prime is 1100121973. The next prime is 1100122013. The reversal of 1100121993 is 3991210011.

It is an interprime number because it is at equal distance from previous prime (1100121973) and next prime (1100122013).

It is not a de Polignac number, because 1100121993 - 2⁵ = 1100121961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1100121943) 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, 92830 + ... + 104007.

It is an arithmetic number, because the mean of its divisors is an integer number (71649032).

Almost surely, 2^1100121993 is an apocalyptic number.

It is an amenable number.

1100121993 is a deficient number, since it is larger than the sum of its proper divisors (619454775).

1100121993 is an equidigital number, since it uses as much as digits as its factorization.

1100121993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196875 (or 196863 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 1100121993 is about 33168.0869662391. The cubic root of 1100121993 is about 1032.3182749391.

The spelling of 1100121993 in words is "one billion, one hundred million, one hundred twenty-one thousand, nine hundred ninety-three".