42155121140 has 48 divisors (see below), whose sum is σ = 96977744640. Its totient is φ = 15264977280.

The previous prime is 42155121121. The next prime is 42155121193. The reversal of 42155121140 is 4112155124.

It is a happy number.

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, 348287 + ... + 453446.

It is an arithmetic number, because the mean of its divisors is an integer number (2020369680).

Almost surely, 2^42155121140 is an apocalyptic number.

It is an amenable number.

42155121140 is an abundant number, since it is smaller than the sum of its proper divisors (54822623500).

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

42155121140 is a wasteful number, since it uses less digits than its factorization.

42155121140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801992 (or 801990 counting only the distinct ones).

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

Adding to 42155121140 its reverse (4112155124), we get a palindrome (46267276264).

The spelling of 42155121140 in words is "forty-two billion, one hundred fifty-five million, one hundred twenty-one thousand, one hundred forty".