1020986891100 has 576 divisors, whose sum is σ = 3714262272000. Its totient is φ = 238412160000.

The previous prime is 1020986890943. The next prime is 1020986891117. The reversal of 1020986891100 is 11986890201.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 110984301 + ... + 110993499.

It is an arithmetic number, because the mean of its divisors is an integer number (6448372000).

Almost surely, 2^{1020986891100} is an apocalyptic number.

1020986891100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020986891100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1857131136000).

1020986891100 is an abundant number, since it is smaller than the sum of its proper divisors (2693275380900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020986891100 is a wasteful number, since it uses less digits than its factorization.

1020986891100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371 (or 9358 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 1020986891100 in words is "one trillion, twenty billion, nine hundred eighty-six million, eight hundred ninety-one thousand, one hundred".