420203020091111 has 2 divisors, whose sum is σ = 420203020091112. Its totient is φ = 420203020091110.

The previous prime is 420203020091081. The next prime is 420203020091161. The reversal of 420203020091111 is 111190020302024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420203020091111 - 2¹⁴ = 420203020074727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420203020091161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210101510045555 + 210101510045556.

It is an arithmetic number, because the mean of its divisors is an integer number (210101510045556).

Almost surely, 2^{420203020091111} is an apocalyptic number.

420203020091111 is a deficient number, since it is larger than the sum of its proper divisors (1).

420203020091111 is an equidigital number, since it uses as much as digits as its factorization.

420203020091111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 420203020091111 its reverse (111190020302024), we get a palindrome (531393040393135).

The spelling of 420203020091111 in words is "four hundred twenty trillion, two hundred three billion, twenty million, ninety-one thousand, one hundred eleven".