420021223122 has 16 divisors (see below), whose sum is σ = 840318721632. Its totient is φ = 139961028480.

The previous prime is 420021223121. The next prime is 420021223129. The reversal of 420021223122 is 221322120024.

It is not an unprimeable number, because it can be changed into a prime (420021223121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11491708 + ... + 11528199.

It is an arithmetic number, because the mean of its divisors is an integer number (52519920102).

Almost surely, 2^420021223122 is an apocalyptic number.

420021223122 is an abundant number, since it is smaller than the sum of its proper divisors (420297498510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420021223122 is a wasteful number, since it uses less digits than its factorization.

420021223122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23022953.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 420021223122 its reverse (221322120024), we get a palindrome (641343343146).

The spelling of 420021223122 in words is "four hundred twenty billion, twenty-one million, two hundred twenty-three thousand, one hundred twenty-two".