140421222121 has 4 divisors (see below), whose sum is σ = 146526492672. Its totient is φ = 134315951572.

The previous prime is 140421222077. The next prime is 140421222127. The reversal of 140421222121 is 121222124041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121222124041 = 1489 ⋅81411769.

It is a cyclic number.

It is not a de Polignac number, because 140421222121 - 2¹⁵ = 140421189353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140421222092 and 140421222101.

It is not an unprimeable number, because it can be changed into a prime (140421222127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3052635241 + ... + 3052635286.

It is an arithmetic number, because the mean of its divisors is an integer number (36631623168).

Almost surely, 2^140421222121 is an apocalyptic number.

It is an amenable number.

140421222121 is a deficient number, since it is larger than the sum of its proper divisors (6105270551).

140421222121 is an equidigital number, since it uses as much as digits as its factorization.

140421222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105270550.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 140421222121 its reverse (121222124041), we get a palindrome (261643346162).

The spelling of 140421222121 in words is "one hundred forty billion, four hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-one".