12221267235 has 32 divisors (see below), whose sum is σ = 20426162688. Its totient is φ = 6227907840.

The previous prime is 12221267213. The next prime is 12221267239. The reversal of 12221267235 is 53276212221.

It is not a de Polignac number, because 12221267235 - 2⁶ = 12221267171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221267196 and 12221267205.

It is not an unprimeable number, because it can be changed into a prime (12221267239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310200 + ... + 347370.

It is an arithmetic number, because the mean of its divisors is an integer number (638317584).

Almost surely, 2^12221267235 is an apocalyptic number.

12221267235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12221267235 is a deficient number, since it is larger than the sum of its proper divisors (8204895453).

12221267235 is a wasteful number, since it uses less digits than its factorization.

12221267235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38155.

The product of its digits is 20160, while the sum is 33.

Adding to 12221267235 its reverse (53276212221), we get a palindrome (65497479456).

The spelling of 12221267235 in words is "twelve billion, two hundred twenty-one million, two hundred sixty-seven thousand, two hundred thirty-five".