1011021002000 has 80 divisors (see below), whose sum is σ = 2444989735344. Its totient is φ = 404352000000.

The previous prime is 1011021001993. The next prime is 1011021002009. The reversal of 1011021002000 is 2001201101.

It can be written as a sum of positive squares in 8 ways, for example, as 7914593296 + 1003106408704 = 88964^2 + 1001552^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×1011021002000³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (1011021002009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16170800 + ... + 16233200.

Almost surely, 2^{1011021002000} is an apocalyptic number.

1011021002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011021002000 is an abundant number, since it is smaller than the sum of its proper divisors (1433968733344).

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

1011021002000 is an equidigital number, since it uses as much as digits as its factorization.

1011021002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70525 (or 70509 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1011021002000 its reverse (2001201101), we get a palindrome (1013022203101).

The spelling of 1011021002000 in words is "one trillion, eleven billion, twenty-one million, two thousand".