210100111221001 has 16 divisors (see below), whose sum is σ = 222037156964160. Its totient is φ = 198251109826560.

The previous prime is 210100111220999. The next prime is 210100111221017. The reversal of 210100111221001 is 100122111001012.

It is a happy number.

It is not a de Polignac number, because 210100111221001 - 2¹ = 210100111220999 is a prime.

It is a super-2 number, since 2×210100111221001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210100111225001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56657265 + ... + 60251521.

It is an arithmetic number, because the mean of its divisors is an integer number (13877322310260).

Almost surely, 2^{210100111221001} is an apocalyptic number.

It is an amenable number.

210100111221001 is a deficient number, since it is larger than the sum of its proper divisors (11937045743159).

210100111221001 is a wasteful number, since it uses less digits than its factorization.

210100111221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606504.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210100111221001 its reverse (100122111001012), we get a palindrome (310222222222013).

The spelling of 210100111221001 in words is "two hundred ten trillion, one hundred billion, one hundred eleven million, two hundred twenty-one thousand, one".