420440211101 has 2 divisors, whose sum is σ = 420440211102. Its totient is φ = 420440211100.

The previous prime is 420440211049. The next prime is 420440211151. The reversal of 420440211101 is 101112044024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412979743225 + 7460467876 = 642635^2 + 86374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420440211101 is a prime.

It is a super-2 number, since 2×420440211101² (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 (420440211151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210220105550 + 210220105551.

It is an arithmetic number, because the mean of its divisors is an integer number (210220105551).

Almost surely, 2^420440211101 is an apocalyptic number.

It is an amenable number.

420440211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

420440211101 is an equidigital number, since it uses as much as digits as its factorization.

420440211101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 420440211101 its reverse (101112044024), we get a palindrome (521552255125).

The spelling of 420440211101 in words is "four hundred twenty billion, four hundred forty million, two hundred eleven thousand, one hundred one".