421222140402 has 32 divisors (see below), whose sum is σ = 962901151872. Its totient is φ = 120335721984.

The previous prime is 421222140389. The next prime is 421222140487. The reversal of 421222140402 is 204041222124.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177823 + ... + 934914.

It is an arithmetic number, because the mean of its divisors is an integer number (30090660996).

Almost surely, 2^421222140402 is an apocalyptic number.

421222140402 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

421222140402 is an abundant number, since it is smaller than the sum of its proper divisors (541679011470).

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

421222140402 is a wasteful number, since it uses less digits than its factorization.

421222140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121762.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 421222140402 its reverse (204041222124), we get a palindrome (625263362526).

The spelling of 421222140402 in words is "four hundred twenty-one billion, two hundred twenty-two million, one hundred forty thousand, four hundred two".