1231215001 has 8 divisors (see below), whose sum is σ = 1314624960. Its totient is φ = 1150294992.

The previous prime is 1231214977. The next prime is 1231215017. The reversal of 1231215001 is 1005121321.

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 1231215001 - 2⁹ = 1231214489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231215031) 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, 621466 + ... + 623443.

It is an arithmetic number, because the mean of its divisors is an integer number (164328120).

Almost surely, 2^1231215001 is an apocalyptic number.

It is an amenable number.

1231215001 is a deficient number, since it is larger than the sum of its proper divisors (83409959).

1231215001 is a wasteful number, since it uses less digits than its factorization.

1231215001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244975.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1231215001 is about 35088.6734004009. The cubic root of 1231215001 is about 1071.7939455191.

Adding to 1231215001 its reverse (1005121321), we get a palindrome (2236336322).

The spelling of 1231215001 in words is "one billion, two hundred thirty-one million, two hundred fifteen thousand, one".