1001201102100 has 144 divisors (see below), whose sum is σ = 3358618784640. Its totient is φ = 255378816000.

The previous prime is 1001201102063. The next prime is 1001201102101. The reversal of 1001201102100 is 12011021001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001201102101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7999101 + ... + 8123300.

It is an arithmetic number, because the mean of its divisors is an integer number (23323741560).

Almost surely, 2^{1001201102100} is an apocalyptic number.

1001201102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001201102100 is an abundant number, since it is smaller than the sum of its proper divisors (2357417682540).

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

1001201102100 is a wasteful number, since it uses less digits than its factorization.

1001201102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16122447 (or 16122434 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1001201102100 its reverse (12011021001), we get a palindrome (1013212123101).

The spelling of 1001201102100 in words is "one trillion, one billion, two hundred one million, one hundred two thousand, one hundred".