1221232422111 has 16 divisors (see below), whose sum is σ = 1755605953920. Its totient is φ = 750652737120.

The previous prime is 1221232422107. The next prime is 1221232422119. The reversal of 1221232422111 is 1112242321221.

It is not a de Polignac number, because 1221232422111 - 2² = 1221232422107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221232422119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18193305 + ... + 18260306.

It is an arithmetic number, because the mean of its divisors is an integer number (109725372120).

Almost surely, 2^{1221232422111} is an apocalyptic number.

1221232422111 is a deficient number, since it is larger than the sum of its proper divisors (534373531809).

1221232422111 is a wasteful number, since it uses less digits than its factorization.

1221232422111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36454486.

The product of its digits is 768, while the sum is 24.

Adding to 1221232422111 its reverse (1112242321221), we get a palindrome (2333474743332).

The spelling of 1221232422111 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-two million, four hundred twenty-two thousand, one hundred eleven".