42412387023821 has 2 divisors, whose sum is σ = 42412387023822. Its totient is φ = 42412387023820.

The previous prime is 42412387023781. The next prime is 42412387023841. The reversal of 42412387023821 is 12832078321424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29639161202596 + 12773225821225 = 5444186^2 + 3573965^2 .

It is a cyclic number.

It is not a de Polignac number, because 42412387023821 - 2²⁶ = 42412319914957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42412387023841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21206193511910 + 21206193511911.

It is an arithmetic number, because the mean of its divisors is an integer number (21206193511911).

Almost surely, 2^{42412387023821} is an apocalyptic number.

It is an amenable number.

42412387023821 is a deficient number, since it is larger than the sum of its proper divisors (1).

42412387023821 is an equidigital number, since it uses as much as digits as its factorization.

42412387023821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1032192, while the sum is 47.

The spelling of 42412387023821 in words is "forty-two trillion, four hundred twelve billion, three hundred eighty-seven million, twenty-three thousand, eight hundred twenty-one".