121121031111 has 16 divisors (see below), whose sum is σ = 165779228160. Its totient is φ = 78633097920.

The previous prime is 121121031077. The next prime is 121121031133. The reversal of 121121031111 is 111130121121.

It is not a de Polignac number, because 121121031111 - 2⁹ = 121121030599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121031211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3483105 + ... + 3517706.

It is an arithmetic number, because the mean of its divisors is an integer number (10361201760).

Almost surely, 2^121121031111 is an apocalyptic number.

121121031111 is a deficient number, since it is larger than the sum of its proper divisors (44658197049).

121121031111 is an equidigital number, since it uses as much as digits as its factorization.

121121031111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000966.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 121121031111 its reverse (111130121121), we get a palindrome (232251152232).

The spelling of 121121031111 in words is "one hundred twenty-one billion, one hundred twenty-one million, thirty-one thousand, one hundred eleven".