140121221421 has 16 divisors (see below), whose sum is σ = 189158860800. Its totient is φ = 92249813040.

The previous prime is 140121221419. The next prime is 140121221441. The reversal of 140121221421 is 124122121041.

It is not a de Polignac number, because 140121221421 - 2¹ = 140121221419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140121221441) 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, 480066 + ... + 714636.

It is an arithmetic number, because the mean of its divisors is an integer number (11822428800).

Almost surely, 2^140121221421 is an apocalyptic number.

It is an amenable number.

140121221421 is a deficient number, since it is larger than the sum of its proper divisors (49037639379).

140121221421 is a wasteful number, since it uses less digits than its factorization.

140121221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237056.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 140121221421 its reverse (124122121041), we get a palindrome (264243342462).

The spelling of 140121221421 in words is "one hundred forty billion, one hundred twenty-one million, two hundred twenty-one thousand, four hundred twenty-one".