42120133013421 has 40 divisors (see below), whose sum is σ = 63213117660000. Its totient is φ = 27949435002720.

The previous prime is 42120133013369. The next prime is 42120133013429. The reversal of 42120133013421 is 12431033102124.

42120133013421 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 0 + 13 + 301 + 342 + 1 = 666.

It is not a de Polignac number, because 42120133013421 - 2⁷ = 42120133013293 is a prime.

It is a super-2 number, since 2×42120133013421² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42120133013429) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 64578466 + ... + 65227436.

It is an arithmetic number, because the mean of its divisors is an integer number (1580327941500).

Almost surely, 2^{42120133013421} is an apocalyptic number.

It is an amenable number.

42120133013421 is a deficient number, since it is larger than the sum of its proper divisors (21092984646579).

42120133013421 is a wasteful number, since it uses less digits than its factorization.

42120133013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652711 (or 652702 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 42120133013421 its reverse (12431033102124), we get a palindrome (54551166115545).

The spelling of 42120133013421 in words is "forty-two trillion, one hundred twenty billion, one hundred thirty-three million, thirteen thousand, four hundred twenty-one".