121420141121 has 4 divisors (see below), whose sum is σ = 121439848752. Its totient is φ = 121400433492.

The previous prime is 121420141111. The next prime is 121420141181. The reversal of 121420141121 is 121141024121.

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 121420141121 - 2¹⁸ = 121419878977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121420141093 and 121420141102.

It is not an unprimeable number, because it can be changed into a prime (121420141111) 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, 9844571 + ... + 9856896.

It is an arithmetic number, because the mean of its divisors is an integer number (30359962188).

Almost surely, 2^121420141121 is an apocalyptic number.

It is an amenable number.

121420141121 is a deficient number, since it is larger than the sum of its proper divisors (19707631).

121420141121 is an equidigital number, since it uses as much as digits as its factorization.

121420141121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19707630.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121420141121 its reverse (121141024121), we get a palindrome (242561165242).

The spelling of 121420141121 in words is "one hundred twenty-one billion, four hundred twenty million, one hundred forty-one thousand, one hundred twenty-one".