21260072222 has 8 divisors (see below), whose sum is σ = 31890825336. Its totient is φ = 10629797112.

The previous prime is 21260072219. The next prime is 21260072257. The reversal of 21260072222 is 22227006212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21260072191 and 21260072200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28208 + ... + 208124.

It is an arithmetic number, because the mean of its divisors is an integer number (3986353167).

Almost surely, 2^21260072222 is an apocalyptic number.

21260072222 is a deficient number, since it is larger than the sum of its proper divisors (10630753114).

21260072222 is a wasteful number, since it uses less digits than its factorization.

21260072222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239002.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 21260072222 its reverse (22227006212), we get a palindrome (43487078434).

The spelling of 21260072222 in words is "twenty-one billion, two hundred sixty million, seventy-two thousand, two hundred twenty-two".