1201163621 has 8 divisors (see below), whose sum is σ = 1375739904. Its totient is φ = 1027332720.

The previous prime is 1201163617. The next prime is 1201163629. The reversal of 1201163621 is 1263611021.

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 1201163621 - 2² = 1201163617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201163629) 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, 182885 + ... + 189338.

It is an arithmetic number, because the mean of its divisors is an integer number (171967488).

Almost surely, 2^1201163621 is an apocalyptic number.

It is an amenable number.

1201163621 is a deficient number, since it is larger than the sum of its proper divisors (174576283).

1201163621 is an equidigital number, since it uses as much as digits as its factorization.

1201163621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372691.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1201163621 is about 34657.8075042262. The cubic root of 1201163621 is about 1063.0019392827.

Adding to 1201163621 its reverse (1263611021), we get a palindrome (2464774642).

The spelling of 1201163621 in words is "one billion, two hundred one million, one hundred sixty-three thousand, six hundred twenty-one".