1020021231000 has 128 divisors (see below), whose sum is σ = 3190486253760. Its totient is φ = 271320192000.

The previous prime is 1020021230989. The next prime is 1020021231059. The reversal of 1020021231000 is 1321200201.

1020021231000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1020021231000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 762780 + ... + 1619220.

Almost surely, 2^{1020021231000} is an apocalyptic number.

1020021231000 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 1020021231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595243126880).

1020021231000 is an abundant number, since it is smaller than the sum of its proper divisors (2170465022760).

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

1020021231000 is a wasteful number, since it uses less digits than its factorization.

1020021231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856862 (or 856848 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1020021231000 its reverse (1321200201), we get a palindrome (1021342431201).

The spelling of 1020021231000 in words is "one trillion, twenty billion, twenty-one million, two hundred thirty-one thousand".