391001220102100 has 144 divisors (see below), whose sum is σ = 887617655084160. Its totient is φ = 149368210444800.

The previous prime is 391001220102043. The next prime is 391001220102167. The reversal of 391001220102100 is 1201022100193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38622705 + ... + 47683495.

It is an arithmetic number, because the mean of its divisors is an integer number (6164011493640).

Almost surely, 2^{391001220102100} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391001220102100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443808827542080).

391001220102100 is an abundant number, since it is smaller than the sum of its proper divisors (496616434982060).

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

391001220102100 is a wasteful number, since it uses less digits than its factorization.

391001220102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061058 (or 9061051 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 391001220102100 its reverse (1201022100193), we get a palindrome (392202242202293).

The spelling of 391001220102100 in words is "three hundred ninety-one trillion, one billion, two hundred twenty million, one hundred two thousand, one hundred".