101215971 has 18 divisors (see below), whose sum is σ = 147821388. Its totient is φ = 66733680.

The previous prime is 101215969. The next prime is 101215987. The reversal of 101215971 is 179512101.

It is not a de Polignac number, because 101215971 - 2¹ = 101215969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101215931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 345301 + ... + 345593.

Almost surely, 2^101215971 is an apocalyptic number.

101215971 is a deficient number, since it is larger than the sum of its proper divisors (46605417).

101215971 is an equidigital number, since it uses as much as digits as its factorization.

101215971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 27.

The square root of 101215971 is about 10060.6148420462. The cubic root of 101215971 is about 466.0326547263.

The spelling of 101215971 in words is "one hundred one million, two hundred fifteen thousand, nine hundred seventy-one".