12402220421 has 16 divisors (see below), whose sum is σ = 12876584448. Its totient is φ = 11936937600.

The previous prime is 12402220393. The next prime is 12402220423.

12402220421 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 12402220421 - 2¹⁰ = 12402219397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12402220393 and 12402220402.

It is a congruent number.

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

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, 1139015 + ... + 1149851.

It is an arithmetic number, because the mean of its divisors is an integer number (804786528).

Almost surely, 2^12402220421 is an apocalyptic number.

It is an amenable number.

12402220421 is a deficient number, since it is larger than the sum of its proper divisors (474364027).

12402220421 is a wasteful number, since it uses less digits than its factorization.

12402220421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11252.

The product of its (nonzero) digits is 512, while the sum is 20.

The spelling of 12402220421 in words is "twelve billion, four hundred two million, two hundred twenty thousand, four hundred twenty-one".