21222156655443 has 16 divisors (see below), whose sum is σ = 28382009472000. Its totient is φ = 14105259821280.

The previous prime is 21222156655421. The next prime is 21222156655501. The reversal of 21222156655443 is 34455665122212.

It is not a de Polignac number, because 21222156655443 - 2⁹ = 21222156654931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21222156655392 and 21222156655401.

It is not an unprimeable number, because it can be changed into a prime (21222156605443) 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, 5434993 + ... + 8484306.

It is an arithmetic number, because the mean of its divisors is an integer number (1773875592000).

Almost surely, 2^{21222156655443} is an apocalyptic number.

21222156655443 is a deficient number, since it is larger than the sum of its proper divisors (7159852816557).

21222156655443 is a wasteful number, since it uses less digits than its factorization.

21222156655443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13920842.

The product of its digits is 3456000, while the sum is 48.

The spelling of 21222156655443 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred fifty-six million, six hundred fifty-five thousand, four hundred forty-three".