42221521431512 has 128 divisors (see below), whose sum is σ = 85641168844800. Its totient is φ = 19443359232000.

The previous prime is 42221521431511. The next prime is 42221521431533. The reversal of 42221521431512 is 21513412512224.

It is a super-2 number, since 2×42221521431512² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42221521431511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495265163 + ... + 495350405.

It is an arithmetic number, because the mean of its divisors is an integer number (669071631600).

Almost surely, 2^{42221521431512} is an apocalyptic number.

It is an amenable number.

42221521431512 is an abundant number, since it is smaller than the sum of its proper divisors (43419647413288).

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

42221521431512 is a wasteful number, since it uses less digits than its factorization.

42221521431512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85777 (or 85773 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

Adding to 42221521431512 its reverse (21513412512224), we get a palindrome (63734933943736).

The spelling of 42221521431512 in words is "forty-two trillion, two hundred twenty-one billion, five hundred twenty-one million, four hundred thirty-one thousand, five hundred twelve".