1021100110989 has 48 divisors (see below), whose sum is σ = 1614989448576. Its totient is φ = 562093344000.

The previous prime is 1021100110981. The next prime is 1021100110997. The reversal of 1021100110989 is 9890110011201.

It is an interprime number because it is at equal distance from previous prime (1021100110981) and next prime (1021100110997).

It is not a de Polignac number, because 1021100110989 - 2³ = 1021100110981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100110981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2727819 + ... + 3079479.

It is an arithmetic number, because the mean of its divisors is an integer number (33645613512).

Almost surely, 2^{1021100110989} is an apocalyptic number.

It is an amenable number.

1021100110989 is a deficient number, since it is larger than the sum of its proper divisors (593889337587).

1021100110989 is a wasteful number, since it uses less digits than its factorization.

1021100110989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351846 (or 351809 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 1021100110989 in words is "one trillion, twenty-one billion, one hundred million, one hundred ten thousand, nine hundred eighty-nine".