42021031331 has 8 divisors (see below), whose sum is σ = 42675601920. Its totient is φ = 41369527368.

The previous prime is 42021031289. The next prime is 42021031337. The reversal of 42021031331 is 13313012024.

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 42021031331 - 2⁶ = 42021031267 is a prime.

It is a super-2 number, since 2×42021031331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021031337) 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, 739031 + ... + 793856.

It is an arithmetic number, because the mean of its divisors is an integer number (5334450240).

Almost surely, 2^42021031331 is an apocalyptic number.

42021031331 is a deficient number, since it is larger than the sum of its proper divisors (654570589).

42021031331 is a wasteful number, since it uses less digits than its factorization.

42021031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533313.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 42021031331 its reverse (13313012024), we get a palindrome (55334043355).

The spelling of 42021031331 in words is "forty-two billion, twenty-one million, thirty-one thousand, three hundred thirty-one".