100001201001220 has 48 divisors (see below), whose sum is σ = 210068286946560. Its totient is φ = 39987955034496.

The previous prime is 100001201001193. The next prime is 100001201001313. The reversal of 100001201001220 is 22100102100001.

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

It is a junction number, because it is equal to n+sod(n) for n = 100001201001197 and 100001201001206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1989533809 + ... + 1989584071.

It is an arithmetic number, because the mean of its divisors is an integer number (4376422644720).

Almost surely, 2^{100001201001220} is an apocalyptic number.

100001201001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100001201001220 is an abundant number, since it is smaller than the sum of its proper divisors (110067085945340).

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

100001201001220 is a wasteful number, since it uses less digits than its factorization.

100001201001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79444 (or 79442 counting only the distinct ones).

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

Adding to 100001201001220 its reverse (22100102100001), we get a palindrome (122101303101221).

The spelling of 100001201001220 in words is "one hundred trillion, one billion, two hundred one million, one thousand, two hundred twenty".