1223211403442 has 16 divisors (see below), whose sum is σ = 2098461131712. Its totient is φ = 523851634320.

The previous prime is 1223211403441. The next prime is 1223211403451. The reversal of 1223211403442 is 2443041123221.

It is a super-2 number, since 2×1223211403442² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1223211403441) 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, 31798784 + ... + 31837227.

It is an arithmetic number, because the mean of its divisors is an integer number (131153820732).

Almost surely, 2^{1223211403442} is an apocalyptic number.

1223211403442 is a deficient number, since it is larger than the sum of its proper divisors (875249728270).

1223211403442 is a wasteful number, since it uses less digits than its factorization.

1223211403442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63637393.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 1223211403442 its reverse (2443041123221), we get a palindrome (3666252526663).

The spelling of 1223211403442 in words is "one trillion, two hundred twenty-three billion, two hundred eleven million, four hundred three thousand, four hundred forty-two".