1021020001100 has 72 divisors (see below), whose sum is σ = 2419361817600. Its totient is φ = 370922241600.

The previous prime is 1021020001049. The next prime is 1021020001129. The reversal of 1021020001100 is 11000201201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 696221 + ... + 1589579.

Almost surely, 2^{1021020001100} is an apocalyptic number.

1021020001100 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 1021020001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209680908800).

1021020001100 is an abundant number, since it is smaller than the sum of its proper divisors (1398341816500).

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

1021020001100 is a wasteful number, since it uses less digits than its factorization.

1021020001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894423 (or 894416 counting only the distinct ones).

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

Adding to 1021020001100 its reverse (11000201201), we get a palindrome (1032020202301).

The spelling of 1021020001100 in words is "one trillion, twenty-one billion, twenty million, one thousand, one hundred".