420201111021 has 16 divisors (see below), whose sum is σ = 593265029184. Its totient is φ = 263637851904.

The previous prime is 420201111017. The next prime is 420201111163. The reversal of 420201111021 is 120111102024.

It is not a de Polignac number, because 420201111021 - 2² = 420201111017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420205111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509466 + ... + 1048788.

It is an arithmetic number, because the mean of its divisors is an integer number (37079064324).

Almost surely, 2^420201111021 is an apocalyptic number.

It is an amenable number.

420201111021 is a deficient number, since it is larger than the sum of its proper divisors (173063918163).

420201111021 is a wasteful number, since it uses less digits than its factorization.

420201111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554620.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 420201111021 its reverse (120111102024), we get a palindrome (540312213045).

The spelling of 420201111021 in words is "four hundred twenty billion, two hundred one million, one hundred eleven thousand, twenty-one".