42154105121 has 8 divisors (see below), whose sum is σ = 42219513600. Its totient is φ = 42088743648.

The previous prime is 42154105073. The next prime is 42154105127. The reversal of 42154105121 is 12150145124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42154105121 - 2⁶ = 42154105057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42154105127) 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, 2056280 + ... + 2076678.

It is an arithmetic number, because the mean of its divisors is an integer number (5277439200).

Almost surely, 2^42154105121 is an apocalyptic number.

It is an amenable number.

42154105121 is a deficient number, since it is larger than the sum of its proper divisors (65408479).

42154105121 is a wasteful number, since it uses less digits than its factorization.

42154105121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23503.

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 42154105121 in words is "forty-two billion, one hundred fifty-four million, one hundred five thousand, one hundred twenty-one".