21224211354226 has 16 divisors (see below), whose sum is σ = 32734821876480. Its totient is φ = 10313271848880.

The previous prime is 21224211354221. The next prime is 21224211354317. The reversal of 21224211354226 is 62245311242212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (21224211354221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166882690 + ... + 167009821.

It is an arithmetic number, because the mean of its divisors is an integer number (2045926367280).

Almost surely, 2^{21224211354226} is an apocalyptic number.

21224211354226 is a deficient number, since it is larger than the sum of its proper divisors (11510610522254).

21224211354226 is a wasteful number, since it uses less digits than its factorization.

21224211354226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333893409.

The product of its digits is 92160, while the sum is 37.

Adding to 21224211354226 its reverse (62245311242212), we get a palindrome (83469522596438).

The spelling of 21224211354226 in words is "twenty-one trillion, two hundred twenty-four billion, two hundred eleven million, three hundred fifty-four thousand, two hundred twenty-six".