134187912221 has 8 divisors (see below), whose sum is σ = 146640523584. Its totient is φ = 121777585920.

The previous prime is 134187912211. The next prime is 134187912241. The reversal of 134187912221 is 122219781431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134187912221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134187912211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10564625 + ... + 10577318.

It is an arithmetic number, because the mean of its divisors is an integer number (18330065448).

Almost surely, 2^134187912221 is an apocalyptic number.

134187912221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

134187912221 is a deficient number, since it is larger than the sum of its proper divisors (12452611363).

134187912221 is a wasteful number, since it uses less digits than its factorization.

134187912221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21142531.

The product of its digits is 48384, while the sum is 41.

The spelling of 134187912221 in words is "one hundred thirty-four billion, one hundred eighty-seven million, nine hundred twelve thousand, two hundred twenty-one".