1215101423 has 4 divisors (see below), whose sum is σ = 1247942040. Its totient is φ = 1182260808.

The previous prime is 1215101417. The next prime is 1215101429. The reversal of 1215101423 is 3241015121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1215101417) and next prime (1215101429).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215101423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1215101395 and 1215101404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215101429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16420253 + ... + 16420326.

It is an arithmetic number, because the mean of its divisors is an integer number (311985510).

Almost surely, 2^1215101423 is an apocalyptic number.

1215101423 is a deficient number, since it is larger than the sum of its proper divisors (32840617).

1215101423 is an equidigital number, since it uses as much as digits as its factorization.

1215101423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32840616.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1215101423 is about 34858.3049358399. The cubic root of 1215101423 is about 1067.0976819439.

Adding to 1215101423 its reverse (3241015121), we get a palindrome (4456116544).

The spelling of 1215101423 in words is "one billion, two hundred fifteen million, one hundred one thousand, four hundred twenty-three".