42120131334440 has 64 divisors (see below), whose sum is σ = 95520385069200. Its totient is φ = 16714853582848.

The previous prime is 42120131334313. The next prime is 42120131334467. The reversal of 42120131334440 is 4443313102124.

It can be written as a sum of positive squares in 8 ways, for example, as 20786614666756 + 21333516667684 = 4559234^2 + 4618822^2 .

It is a super-2 number, since 2×42120131334440² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42120131334397 and 42120131334406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6623126 + ... + 11318394.

Almost surely, 2^{42120131334440} is an apocalyptic number.

42120131334440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42120131334440 is an abundant number, since it is smaller than the sum of its proper divisors (53400253734760).

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

42120131334440 is a wasteful number, since it uses less digits than its factorization.

42120131334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4697054 (or 4697050 counting only the distinct ones).

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

Adding to 42120131334440 its reverse (4443313102124), we get a palindrome (46563444436564).

The spelling of 42120131334440 in words is "forty-two trillion, one hundred twenty billion, one hundred thirty-one million, three hundred thirty-four thousand, four hundred forty".