420861561103 has 2 divisors, whose sum is σ = 420861561104. Its totient is φ = 420861561102.

The previous prime is 420861561097. The next prime is 420861561167. The reversal of 420861561103 is 301165168024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420861561103 - 2²¹ = 420859463951 is a prime.

It is a super-2 number, since 2×420861561103² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420861562103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210430780551 + 210430780552.

It is an arithmetic number, because the mean of its divisors is an integer number (210430780552).

Almost surely, 2^420861561103 is an apocalyptic number.

420861561103 is a deficient number, since it is larger than the sum of its proper divisors (1).

420861561103 is an equidigital number, since it uses as much as digits as its factorization.

420861561103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 420861561103 in words is "four hundred twenty billion, eight hundred sixty-one million, five hundred sixty-one thousand, one hundred three".