1161211001 has 8 divisors (see below), whose sum is σ = 1190126784. Its totient is φ = 1132382160.

The previous prime is 1161210983. The next prime is 1161211003. The reversal of 1161211001 is 1001121611.

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 1161211001 - 2²² = 1157016697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161211003) 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, 5735 + ... + 48531.

It is an arithmetic number, because the mean of its divisors is an integer number (148765848).

Almost surely, 2^1161211001 is an apocalyptic number.

It is an amenable number.

1161211001 is a deficient number, since it is larger than the sum of its proper divisors (28915783).

1161211001 is an equidigital number, since it uses as much as digits as its factorization.

1161211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43471.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 1161211001 is about 34076.5462011631. The cubic root of 1161211001 is about 1051.0830852751.

Adding to 1161211001 its reverse (1001121611), we get a palindrome (2162332612).

The spelling of 1161211001 in words is "one billion, one hundred sixty-one million, two hundred eleven thousand, one".