42021311434187 has 2 divisors, whose sum is σ = 42021311434188. Its totient is φ = 42021311434186.

The previous prime is 42021311434169. The next prime is 42021311434243. The reversal of 42021311434187 is 78143411312024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42021311434187 - 2³⁸ = 41746433527243 is a prime.

It is a super-2 number, since 2×42021311434187² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42021311434127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010655717093 + 21010655717094.

It is an arithmetic number, because the mean of its divisors is an integer number (21010655717094).

Almost surely, 2^{42021311434187} is an apocalyptic number.

42021311434187 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021311434187 is an equidigital number, since it uses as much as digits as its factorization.

42021311434187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 42021311434187 in words is "forty-two trillion, twenty-one billion, three hundred eleven million, four hundred thirty-four thousand, one hundred eighty-seven".