42031134221 has 4 divisors (see below), whose sum is σ = 44243299200. Its totient is φ = 39818969244.

The previous prime is 42031134217. The next prime is 42031134269. The reversal of 42031134221 is 12243113024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42031134221 - 2² = 42031134217 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 (42031134281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106082461 + ... + 1106082498.

It is an arithmetic number, because the mean of its divisors is an integer number (11060824800).

Almost surely, 2^42031134221 is an apocalyptic number.

It is an amenable number.

42031134221 is a deficient number, since it is larger than the sum of its proper divisors (2212164979).

42031134221 is a wasteful number, since it uses less digits than its factorization.

42031134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212164978.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 42031134221 its reverse (12243113024), we get a palindrome (54274247245).

The spelling of 42031134221 in words is "forty-two billion, thirty-one million, one hundred thirty-four thousand, two hundred twenty-one".