140121111 has 12 divisors (see below), whose sum is σ = 202305768. Its totient is φ = 86228064.

The previous prime is 140121077. The next prime is 140121131. The reversal of 140121111 is 111121041.

It is not a de Polignac number, because 140121111 - 2¹⁹ = 139596823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137680 + ... + 138693.

It is an arithmetic number, because the mean of its divisors is an integer number (16858814).

Almost surely, 2^140121111 is an apocalyptic number.

140121111 is a deficient number, since it is larger than the sum of its proper divisors (62184657).

140121111 is a wasteful number, since it uses less digits than its factorization.

140121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276402 (or 276389 counting only the distinct ones).

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

The square root of 140121111 is about 11837.2763336842. The cubic root of 140121111 is about 519.3990975423.

Adding to 140121111 its reverse (111121041), we get a palindrome (251242152).

The spelling of 140121111 in words is "one hundred forty million, one hundred twenty-one thousand, one hundred eleven".