1201211399 has 4 divisors (see below), whose sum is σ = 1230509280. Its totient is φ = 1171913520.

The previous prime is 1201211393. The next prime is 1201211411. The reversal of 1201211399 is 9931121021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201211399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201211393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14648879 + ... + 14648960.

It is an arithmetic number, because the mean of its divisors is an integer number (307627320).

Almost surely, 2^1201211399 is an apocalyptic number.

1201211399 is a deficient number, since it is larger than the sum of its proper divisors (29297881).

1201211399 is an equidigital number, since it uses as much as digits as its factorization.

1201211399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29297880.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1201211399 is about 34658.4967792892. The cubic root of 1201211399 is about 1063.0160332364.

The spelling of 1201211399 in words is "one billion, two hundred one million, two hundred eleven thousand, three hundred ninety-nine".