1210101201 has 20 divisors (see below), whose sum is σ = 1808931124. Its totient is φ = 806176800.

The previous prime is 1210101163. The next prime is 1210101229. The reversal of 1210101201 is 1021010121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 731025 + 1209370176 = 855^2 + 34776^2 .

It is not a de Polignac number, because 1210101201 - 2¹⁷ = 1209970129 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1210101251) 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, 136731 + ... + 145311.

Almost surely, 2^1210101201 is an apocalyptic number.

It is an amenable number.

1210101201 is a deficient number, since it is larger than the sum of its proper divisors (598829923).

1210101201 is an equidigital number, since it uses as much as digits as its factorization.

1210101201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10334 (or 10325 counting only the distinct ones).

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

The square root of 1210101201 is about 34786.5088935351. The cubic root of 1210101201 is about 1065.6319439307.

Adding to 1210101201 its reverse (1021010121), we get a palindrome (2231111322).

It can be divided in two parts, 121010120 and 1, that added together give a palindrome (121010121).

The spelling of 1210101201 in words is "one billion, two hundred ten million, one hundred one thousand, two hundred one".