1021001101000 has 64 divisors (see below), whose sum is σ = 2391217386480. Its totient is φ = 408045772800.

The previous prime is 1021001100983. The next prime is 1021001101091. The reversal of 1021001101000 is 1011001201.

It can be written as a sum of positive squares in 8 ways, for example, as 444971711844 + 576029389156 = 667062^2 + 758966^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710242 + ... + 1595758.

Almost surely, 2^{1021001101000} is an apocalyptic number.

1021001101000 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 1021001101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195608693240).

1021001101000 is an abundant number, since it is smaller than the sum of its proper divisors (1370216285480).

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

1021001101000 is a wasteful number, since it uses less digits than its factorization.

1021001101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886691 (or 886677 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1021001101000 its reverse (1011001201), we get a palindrome (1022012102201).

The spelling of 1021001101000 in words is "one trillion, twenty-one billion, one million, one hundred one thousand".