1001201220100 has 36 divisors (see below), whose sum is σ = 2179170485968. Its totient is φ = 399270564000.

The previous prime is 1001201220059. The next prime is 1001201220133. The reversal of 1001201220100 is 10221021001.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15090786 + ... + 15156985.

Almost surely, 2^{1001201220100} is an apocalyptic number.

1001201220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001201220100 is an abundant number, since it is smaller than the sum of its proper divisors (1177969265868).

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

1001201220100 is a wasteful number, since it uses less digits than its factorization.

1001201220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30248116 (or 30248109 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001201220100 its reverse (10221021001), we get a palindrome (1011422241101).

The spelling of 1001201220100 in words is "one trillion, one billion, two hundred one million, two hundred twenty thousand, one hundred".