1021090899744 has 192 divisors, whose sum is σ = 3007910707200. Its totient is φ = 336979678464.

The previous prime is 1021090899737. The next prime is 1021090899767. The reversal of 1021090899744 is 4479980901201.

It is a super-2 number, since 2×1021090899744² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44063649 + ... + 44086815.

It is an arithmetic number, because the mean of its divisors is an integer number (15666201600).

Almost surely, 2^{1021090899744} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021090899744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1503955353600).

1021090899744 is an abundant number, since it is smaller than the sum of its proper divisors (1986819807456).

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

1021090899744 is a wasteful number, since it uses less digits than its factorization.

1021090899744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23692 (or 23678 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 1021090899744 in words is "one trillion, twenty-one billion, ninety million, eight hundred ninety-nine thousand, seven hundred forty-four".