171221054641134 has 32 divisors (see below), whose sum is σ = 351698162772096. Its totient is φ = 55531016854560.

The previous prime is 171221054641073. The next prime is 171221054641163. The reversal of 171221054641134 is 431146450122171.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131885149 + ... + 133177079.

It is an arithmetic number, because the mean of its divisors is an integer number (10990567586628).

Almost surely, 2^{171221054641134} is an apocalyptic number.

171221054641134 is an abundant number, since it is smaller than the sum of its proper divisors (180477108130962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171221054641134 is a wasteful number, since it uses less digits than its factorization.

171221054641134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888960.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 171221054641134 in words is "one hundred seventy-one trillion, two hundred twenty-one billion, fifty-four million, six hundred forty-one thousand, one hundred thirty-four".