21226226707 has 16 divisors (see below), whose sum is σ = 25820024832. Its totient is φ = 17034007680.

The previous prime is 21226226699. The next prime is 21226226731. The reversal of 21226226707 is 70762262212.

It is a cyclic number.

It is not a de Polignac number, because 21226226707 - 2³ = 21226226699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21226226767) 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, 444213 + ... + 489670.

It is an arithmetic number, because the mean of its divisors is an integer number (1613751552).

Almost surely, 2^21226226707 is an apocalyptic number.

21226226707 is a deficient number, since it is larger than the sum of its proper divisors (4593798125).

21226226707 is a wasteful number, since it uses less digits than its factorization.

21226226707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934098.

The product of its (nonzero) digits is 56448, while the sum is 37.

Adding to 21226226707 its reverse (70762262212), we get a palindrome (91988488919).

The spelling of 21226226707 in words is "twenty-one billion, two hundred twenty-six million, two hundred twenty-six thousand, seven hundred seven".