42121334221340 has 96 divisors (see below), whose sum is σ = 96931905977088. Its totient is φ = 15247695680000.

The previous prime is 42121334221339. The next prime is 42121334221357. The reversal of 42121334221340 is 4312243312124.

It is a happy number.

It is a super-2 number, since 2×42121334221340² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42121334221297 and 42121334221306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 509896040 + ... + 509978640.

It is an arithmetic number, because the mean of its divisors is an integer number (1009707353928).

Almost surely, 2^{42121334221340} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42121334221340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48465952988544).

42121334221340 is an abundant number, since it is smaller than the sum of its proper divisors (54810571755748).

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

42121334221340 is a wasteful number, since it uses less digits than its factorization.

42121334221340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93059 (or 93057 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 42121334221340 its reverse (4312243312124), we get a palindrome (46433577533464).

The spelling of 42121334221340 in words is "forty-two trillion, one hundred twenty-one billion, three hundred thirty-four million, two hundred twenty-one thousand, three hundred forty".