1021201011100 has 72 divisors (see below), whose sum is σ = 2310139391616. Its totient is φ = 391389600000.

The previous prime is 1021201011097. The next prime is 1021201011133. The reversal of 1021201011100 is 11101021201.

1021201011100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 1317691 + ... + 1943890.

It is an arithmetic number, because the mean of its divisors is an integer number (32085269328).

Almost surely, 2^{1021201011100} is an apocalyptic number.

1021201011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021201011100 is an abundant number, since it is smaller than the sum of its proper divisors (1288938380516).

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

1021201011100 is a wasteful number, since it uses less digits than its factorization.

1021201011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3261727 (or 3261720 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1021201011100 its reverse (11101021201), we get a palindrome (1032302032301).

It can be divided in two parts, 102120101 and 1100, that added together give a palindrome (102121201).

The spelling of 1021201011100 in words is "one trillion, twenty-one billion, two hundred one million, eleven thousand, one hundred".