2101220201 has 8 divisors (see below), whose sum is σ = 2188269000. Its totient is φ = 2015144320.

The previous prime is 2101220183. The next prime is 2101220227. The reversal of 2101220201 is 1020221012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22316176 + 2078904025 = 4724^2 + 45595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101220201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101220801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238820 + ... + 247461.

It is an arithmetic number, because the mean of its divisors is an integer number (273533625).

Almost surely, 2^2101220201 is an apocalyptic number.

It is an amenable number.

2101220201 is a deficient number, since it is larger than the sum of its proper divisors (87048799).

2101220201 is a wasteful number, since it uses less digits than its factorization.

2101220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486459.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2101220201 is about 45839.0685005706. The cubic root of 2101220201 is about 1280.8271429929.

Adding to 2101220201 its reverse (1020221012), we get a palindrome (3121441213).

The spelling of 2101220201 in words is "two billion, one hundred one million, two hundred twenty thousand, two hundred one".