2157050101217 has 16 divisors (see below), whose sum is σ = 2452870918080. Its totient is φ = 1878882532800.

The previous prime is 2157050101181. The next prime is 2157050101247. The reversal of 2157050101217 is 7121010507512.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2157050101217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157050101247) 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, 25767038 + ... + 25850615.

It is an arithmetic number, because the mean of its divisors is an integer number (153304432380).

Almost surely, 2^{2157050101217} is an apocalyptic number.

It is an amenable number.

2157050101217 is a deficient number, since it is larger than the sum of its proper divisors (295820816863).

2157050101217 is a wasteful number, since it uses less digits than its factorization.

2157050101217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51617824.

The product of its (nonzero) digits is 4900, while the sum is 32.

Adding to 2157050101217 its reverse (7121010507512), we get a palindrome (9278060608729).

The spelling of 2157050101217 in words is "two trillion, one hundred fifty-seven billion, fifty million, one hundred one thousand, two hundred seventeen".