42120121232 has 40 divisors (see below), whose sum is σ = 93354149952. Its totient is φ = 18034416000.

The previous prime is 42120121091. The next prime is 42120121243. The reversal of 42120121232 is 23212102124.

It is a super-2 number, since 2×42120121232² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58394 + ... + 296057.

Almost surely, 2^42120121232 is an apocalyptic number.

It is an amenable number.

42120121232 is an abundant number, since it is smaller than the sum of its proper divisors (51234028720).

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

42120121232 is a wasteful number, since it uses less digits than its factorization.

42120121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355527 (or 355521 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42120121232 its reverse (23212102124), we get a palindrome (65332223356).

The spelling of 42120121232 in words is "forty-two billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-two".