111202010001 has 20 divisors (see below), whose sum is σ = 171844744500. Its totient is φ = 71578303776.

The previous prime is 111202009969. The next prime is 111202010009. The reversal of 111202010001 is 100010202111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55025899776 + 56176110225 = 234576^2 + 237015^2 .

It is not a de Polignac number, because 111202010001 - 2⁵ = 111202009969 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (111202010009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23667726 + ... + 23672423.

It is an arithmetic number, because the mean of its divisors is an integer number (8592237225).

Almost surely, 2^111202010001 is an apocalyptic number.

It is an amenable number.

111202010001 is a deficient number, since it is larger than the sum of its proper divisors (60642734499).

111202010001 is an equidigital number, since it uses as much as digits as its factorization.

111202010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47340190 (or 47340181 counting only the distinct ones).

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

Adding to 111202010001 its reverse (100010202111), we get a palindrome (211212212112).

The spelling of 111202010001 in words is "one hundred eleven billion, two hundred two million, ten thousand, one".