421140222 has 20 divisors (see below), whose sum is σ = 943666416. Its totient is φ = 140380020.

The previous prime is 421140211. The next prime is 421140259. The reversal of 421140222 is 222041124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421140195 and 421140204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1299654 + ... + 1299977.

Almost surely, 2^421140222 is an apocalyptic number.

421140222 is an abundant number, since it is smaller than the sum of its proper divisors (522526194).

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

421140222 is a wasteful number, since it uses less digits than its factorization.

421140222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599645 (or 2599636 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421140222 is about 20521.7012452672. The cubic root of 421140222 is about 749.5643229630.

Adding to 421140222 its reverse (222041124), we get a palindrome (643181346).

The spelling of 421140222 in words is "four hundred twenty-one million, one hundred forty thousand, two hundred twenty-two".