42121231124240 has 40 divisors (see below), whose sum is σ = 97962438002688. Its totient is φ = 16843232124800.

The previous prime is 42121231124233. The next prime is 42121231124299. The reversal of 42121231124240 is 4242113212124.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×42121231124240² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81934736 + ... + 82447215.

Almost surely, 2^{42121231124240} is an apocalyptic number.

42121231124240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42121231124240 is an abundant number, since it is smaller than the sum of its proper divisors (55841206878448).

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

42121231124240 is a wasteful number, since it uses less digits than its factorization.

42121231124240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164385167 (or 164385161 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 42121231124240 its reverse (4242113212124), we get a palindrome (46363344336364).

The spelling of 42121231124240 in words is "forty-two trillion, one hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, two hundred forty".