421236022 has 4 divisors (see below), whose sum is σ = 631854036. Its totient is φ = 210618010.

The previous prime is 421236001. The next prime is 421236077. The reversal of 421236022 is 220632124.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 421235984 and 421236002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105309004 + ... + 105309007.

It is an arithmetic number, because the mean of its divisors is an integer number (157963509).

Almost surely, 2^421236022 is an apocalyptic number.

421236022 is a deficient number, since it is larger than the sum of its proper divisors (210618014).

421236022 is a wasteful number, since it uses less digits than its factorization.

421236022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210618013.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 421236022 is about 20524.0352270210. The cubic root of 421236022 is about 749.6211550379.

Adding to 421236022 its reverse (220632124), we get a palindrome (641868146).

The spelling of 421236022 in words is "four hundred twenty-one million, two hundred thirty-six thousand, twenty-two".