420201013021 has 2 divisors, whose sum is σ = 420201013022. Its totient is φ = 420201013020.

The previous prime is 420201013019. The next prime is 420201013027. The reversal of 420201013021 is 120310102024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297761205625 + 122439807396 = 545675^2 + 349914^2 .

It is a cyclic number.

It is not a de Polignac number, because 420201013021 - 2¹ = 420201013019 is a prime.

It is a super-2 number, since 2×420201013021² (a number of 24 digits) contains 22 as substring.

Together with 420201013019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 420201012986 and 420201013004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420201013027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210100506510 + 210100506511.

It is an arithmetic number, because the mean of its divisors is an integer number (210100506511).

Almost surely, 2^420201013021 is an apocalyptic number.

It is an amenable number.

420201013021 is a deficient number, since it is larger than the sum of its proper divisors (1).

420201013021 is an equidigital number, since it uses as much as digits as its factorization.

420201013021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 420201013021 its reverse (120310102024), we get a palindrome (540511115045).

The spelling of 420201013021 in words is "four hundred twenty billion, two hundred one million, thirteen thousand, twenty-one".