1215101010171 has 16 divisors (see below), whose sum is σ = 1654559650080. Its totient is φ = 793035091200.

The previous prime is 1215101010139. The next prime is 1215101010197. The reversal of 1215101010171 is 1710101015121.

It is not a de Polignac number, because 1215101010171 - 2⁵ = 1215101010139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1215101010121) 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, 22502440 + ... + 22556373.

It is an arithmetic number, because the mean of its divisors is an integer number (103409978130).

Almost surely, 2^{1215101010171} is an apocalyptic number.

1215101010171 is a deficient number, since it is larger than the sum of its proper divisors (439458639909).

1215101010171 is a wasteful number, since it uses less digits than its factorization.

1215101010171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45059006.

The product of its (nonzero) digits is 70, while the sum is 21.

Adding to 1215101010171 its reverse (1710101015121), we get a palindrome (2925202025292).

The spelling of 1215101010171 in words is "one trillion, two hundred fifteen billion, one hundred one million, ten thousand, one hundred seventy-one".