21402220412 has 6 divisors (see below), whose sum is σ = 37453885728. Its totient is φ = 10701110204.

The previous prime is 21402220403. The next prime is 21402220423.

21402220412 is nontrivially palindromic in base 10.

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, 2675277548 + ... + 2675277555.

It is an arithmetic number, because the mean of its divisors is an integer number (6242314288).

Almost surely, 2^21402220412 is an apocalyptic number.

It is an amenable number.

21402220412 is a deficient number, since it is larger than the sum of its proper divisors (16051665316).

21402220412 is a wasteful number, since it uses less digits than its factorization.

21402220412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5350555107 (or 5350555105 counting only the distinct ones).

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

The spelling of 21402220412 in words is "twenty-one billion, four hundred two million, two hundred twenty thousand, four hundred twelve".