140020121 has 4 divisors (see below), whose sum is σ = 141027600. Its totient is φ = 139012644.

The previous prime is 140020103. The next prime is 140020141. The reversal of 140020121 is 121020041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140020121 - 2²⁶ = 72911257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140020141) 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 3 ways as a sum of consecutive naturals, for example, 503531 + ... + 503808.

It is an arithmetic number, because the mean of its divisors is an integer number (35256900).

Almost surely, 2^140020121 is an apocalyptic number.

It is an amenable number.

140020121 is a deficient number, since it is larger than the sum of its proper divisors (1007479).

140020121 is a wasteful number, since it uses less digits than its factorization.

140020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007478.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 140020121 is about 11833.0098030890. The cubic root of 140020121 is about 519.2742847492.

Adding to 140020121 its reverse (121020041), we get a palindrome (261040162).

The spelling of 140020121 in words is "one hundred forty million, twenty thousand, one hundred twenty-one".