1232121221111 has 32 divisors (see below), whose sum is σ = 1408834183680. Its totient is φ = 1067281488000.

The previous prime is 1232121221101. The next prime is 1232121221117. The reversal of 1232121221111 is 1111221212321.

It is a cyclic number.

It is not a de Polignac number, because 1232121221111 - 2⁶ = 1232121221047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232121221117) 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, 9828950 + ... + 9953516.

It is an arithmetic number, because the mean of its divisors is an integer number (44026068240).

Almost surely, 2^{1232121221111} is an apocalyptic number.

1232121221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1232121221111 is a deficient number, since it is larger than the sum of its proper divisors (176712962569).

1232121221111 is a wasteful number, since it uses less digits than its factorization.

1232121221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125015.

The product of its digits is 96, while the sum is 20.

Adding to 1232121221111 its reverse (1111221212321), we get a palindrome (2343342433432).

The spelling of 1232121221111 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".