12221042402 has 16 divisors (see below), whose sum is σ = 19308791040. Its totient is φ = 5785192368.

The previous prime is 12221042401. The next prime is 12221042419. The reversal of 12221042402 is 20424012221.

It is not an unprimeable number, because it can be changed into a prime (12221042401) 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, 43073 + ... + 162164.

It is an arithmetic number, because the mean of its divisors is an integer number (1206799440).

Almost surely, 2^12221042402 is an apocalyptic number.

12221042402 is a deficient number, since it is larger than the sum of its proper divisors (7087748638).

12221042402 is a wasteful number, since it uses less digits than its factorization.

12221042402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206825.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12221042402 its reverse (20424012221), we get a palindrome (32645054623).

The spelling of 12221042402 in words is "twelve billion, two hundred twenty-one million, forty-two thousand, four hundred two".