1201031663 has 16 divisors (see below), whose sum is σ = 1312246656. Its totient is φ = 1092574560.

The previous prime is 1201031653. The next prime is 1201031681. The reversal of 1201031663 is 3661301021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201031663 - 2⁶ = 1201031599 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 (1201031653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528656 + ... + 530922.

It is an arithmetic number, because the mean of its divisors is an integer number (82015416).

Almost surely, 2^1201031663 is an apocalyptic number.

1201031663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201031663 is a deficient number, since it is larger than the sum of its proper divisors (111214993).

1201031663 is a wasteful number, since it uses less digits than its factorization.

1201031663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1201031663 is about 34655.9037250509. The cubic root of 1201031663 is about 1062.9630112676.

Adding to 1201031663 its reverse (3661301021), we get a palindrome (4862332684).

The spelling of 1201031663 in words is "one billion, two hundred one million, thirty-one thousand, six hundred sixty-three".