12402220420 has 24 divisors (see below), whose sum is σ = 26046788544. Its totient is φ = 4960483296.

The previous prime is 12402220393. The next prime is 12402220423. The reversal of 12402220420 is 2402220421.

It is not an unprimeable number, because it can be changed into a prime (12402220423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401239 + ... + 431041.

It is an arithmetic number, because the mean of its divisors is an integer number (1085282856).

Almost surely, 2^12402220420 is an apocalyptic number.

12402220420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12402220420 is an abundant number, since it is smaller than the sum of its proper divisors (13644568124).

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

12402220420 is a wasteful number, since it uses less digits than its factorization.

12402220420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50619 (or 50617 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 12402220420 its reverse (2402220421), we get a palindrome (14804440841).

Subtracting from 12402220420 its reverse (2402220421), we obtain a palindrome (9999999999).

The spelling of 12402220420 in words is "twelve billion, four hundred two million, two hundred twenty thousand, four hundred twenty".