421320213402 has 32 divisors (see below), whose sum is σ = 920316855744. Its totient is φ = 127523798400.

The previous prime is 421320213397. The next prime is 421320213403. The reversal of 421320213402 is 204312023124.

It is a happy number.

It is a super-2 number, since 2×421320213402² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421320213403) 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, 3667849 + ... + 3780972.

It is an arithmetic number, because the mean of its divisors is an integer number (28759901742).

Almost surely, 2^421320213402 is an apocalyptic number.

421320213402 is an abundant number, since it is smaller than the sum of its proper divisors (498996642342).

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

421320213402 is a wasteful number, since it uses less digits than its factorization.

421320213402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7449694.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 421320213402 its reverse (204312023124), we get a palindrome (625632236526).

The spelling of 421320213402 in words is "four hundred twenty-one billion, three hundred twenty million, two hundred thirteen thousand, four hundred two".