421123011220 has 96 divisors (see below), whose sum is σ = 929588825088. Its totient is φ = 159945257472.

The previous prime is 421123011217. The next prime is 421123011269. The reversal of 421123011220 is 22110321124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41952042 + ... + 41962078.

It is an arithmetic number, because the mean of its divisors is an integer number (9683216928).

Almost surely, 2^421123011220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421123011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464794412544).

421123011220 is an abundant number, since it is smaller than the sum of its proper divisors (508465813868).

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

421123011220 is a wasteful number, since it uses less digits than its factorization.

421123011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729 (or 10727 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 421123011220 its reverse (22110321124), we get a palindrome (443233332344).

The spelling of 421123011220 in words is "four hundred twenty-one billion, one hundred twenty-three million, eleven thousand, two hundred twenty".