1203211311 has 8 divisors (see below), whose sum is σ = 1605875760. Its totient is φ = 801343872.

The previous prime is 1203211291. The next prime is 1203211391. The reversal of 1203211311 is 1131123021.

It is a happy number.

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

It is not a de Polignac number, because 1203211311 - 2¹⁰ = 1203210287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203211391) 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, 195720 + ... + 201773.

It is an arithmetic number, because the mean of its divisors is an integer number (200734470).

Almost surely, 2^1203211311 is an apocalyptic number.

1203211311 is a deficient number, since it is larger than the sum of its proper divisors (402664449).

1203211311 is a wasteful number, since it uses less digits than its factorization.

1203211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398505.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1203211311 is about 34687.3364644794. The cubic root of 1203211311 is about 1063.6056490689.

Adding to 1203211311 its reverse (1131123021), we get a palindrome (2334334332).

The spelling of 1203211311 in words is "one billion, two hundred three million, two hundred eleven thousand, three hundred eleven".