42100021220333 has 2 divisors, whose sum is σ = 42100021220334. Its totient is φ = 42100021220332.

The previous prime is 42100021220311. The next prime is 42100021220339. The reversal of 42100021220333 is 33302212000124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37587910286404 + 4512110933929 = 6130898^2 + 2124173^2 .

It is a cyclic number.

It is not a de Polignac number, because 42100021220333 - 2¹⁴ = 42100021203949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42100021220299 and 42100021220308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42100021220339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050010610166 + 21050010610167.

It is an arithmetic number, because the mean of its divisors is an integer number (21050010610167).

Almost surely, 2^{42100021220333} is an apocalyptic number.

It is an amenable number.

42100021220333 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100021220333 is an equidigital number, since it uses as much as digits as its factorization.

42100021220333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 42100021220333 its reverse (33302212000124), we get a palindrome (75402233220457).

The spelling of 42100021220333 in words is "forty-two trillion, one hundred billion, twenty-one million, two hundred twenty thousand, three hundred thirty-three".