121401111 has 16 divisors (see below), whose sum is σ = 177611616. Its totient is φ = 73297536.

The previous prime is 121401109. The next prime is 121401149. The reversal of 121401111 is 111104121.

It is not a de Polignac number, because 121401111 - 2¹ = 121401109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121401101) 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, 27300 + ... + 31433.

It is an arithmetic number, because the mean of its divisors is an integer number (11100726).

Almost surely, 2^121401111 is an apocalyptic number.

121401111 is a deficient number, since it is larger than the sum of its proper divisors (56210505).

121401111 is a wasteful number, since it uses less digits than its factorization.

121401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58802.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 121401111 is about 11018.2172332914. The cubic root of 121401111 is about 495.1546787293.

Adding to 121401111 its reverse (111104121), we get a palindrome (232505232).

The spelling of 121401111 in words is "one hundred twenty-one million, four hundred one thousand, one hundred eleven".