1001211201 has 6 divisors (see below), whose sum is σ = 1446193970. Its totient is φ = 667474128.

The previous prime is 1001211199. The next prime is 1001211203. The reversal of 1001211201 is 1021121001.

It is a happy number.

1001211201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1001211199) and next prime (1001211203).

It can be written as a sum of positive squares in only one way, i.e., 589324176 + 411887025 = 24276^2 + 20295^2 .

It is not a de Polignac number, because 1001211201 - 2¹ = 1001211199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 111245689 = 1001211201 / (1 + 0 + 0 + 1 + 2 + 1 + 1 + 2 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1001211203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55622836 + ... + 55622853.

Almost surely, 2^1001211201 is an apocalyptic number.

It is an amenable number.

1001211201 is a deficient number, since it is larger than the sum of its proper divisors (444982769).

1001211201 is a wasteful number, since it uses less digits than its factorization.

1001211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111245695 (or 111245692 counting only the distinct ones).

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

The square root of 1001211201 is about 31641.9215756566. The cubic root of 1001211201 is about 1000.4035707754.

Adding to 1001211201 its reverse (1021121001), we get a palindrome (2022332202).

The spelling of 1001211201 in words is "one billion, one million, two hundred eleven thousand, two hundred one".