2171336855121 has 80 divisors (see below), whose sum is σ = 3781412654976. Its totient is φ = 1216036571904.

The previous prime is 2171336855101. The next prime is 2171336855183. The reversal of 2171336855121 is 1215586331712.

2171336855121 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 33 + 68 + 551 + 2 + 1 = 666.

It is not a de Polignac number, because 2171336855121 - 2⁷ = 2171336854993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2171336855101) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7338765 + ... + 7628901.

Almost surely, 2^{2171336855121} is an apocalyptic number.

2171336855121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2171336855121 is a deficient number, since it is larger than the sum of its proper divisors (1610075799855).

2171336855121 is a wasteful number, since it uses less digits than its factorization.

2171336855121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290420 (or 290411 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 2171336855121 in words is "two trillion, one hundred seventy-one billion, three hundred thirty-six million, eight hundred fifty-five thousand, one hundred twenty-one".