1201211401 has 8 divisors (see below), whose sum is σ = 1328575304. Its totient is φ = 1078842240.

The previous prime is 1201211393. The next prime is 1201211411. The reversal of 1201211401 is 1041121021.

It can be written as a sum of positive squares in 4 ways, for example, as 210221001 + 990990400 = 14499^2 + 31480^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1201211401 - 2³ = 1201211393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201211411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1248180 + ... + 1249141.

It is an arithmetic number, because the mean of its divisors is an integer number (166071913).

Almost surely, 2^1201211401 is an apocalyptic number.

It is an amenable number.

1201211401 is a deficient number, since it is larger than the sum of its proper divisors (127363903).

1201211401 is a wasteful number, since it uses less digits than its factorization.

1201211401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497371.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1201211401 is about 34658.4968081422. The cubic root of 1201211401 is about 1063.0160338263.

Adding to 1201211401 its reverse (1041121021), we get a palindrome (2242332422).

The spelling of 1201211401 in words is "one billion, two hundred one million, two hundred eleven thousand, four hundred one".