121231221341 has 4 divisors (see below), whose sum is σ = 126502144032. Its totient is φ = 115960298652.

The previous prime is 121231221277. The next prime is 121231221359. The reversal of 121231221341 is 143122132121.

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 121231221341 - 2⁶ = 121231221277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 5270922667 = 121231221341 / (1 + 2 + 1 + 2 + 3 + 1 + 2 + 2 + 1 + 3 + 4 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231281341) 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, 2635461311 + ... + 2635461356.

It is an arithmetic number, because the mean of its divisors is an integer number (31625536008).

Almost surely, 2^121231221341 is an apocalyptic number.

It is an amenable number.

121231221341 is a deficient number, since it is larger than the sum of its proper divisors (5270922691).

121231221341 is an equidigital number, since it uses as much as digits as its factorization.

121231221341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270922690.

The product of its digits is 576, while the sum is 23.

Adding to 121231221341 its reverse (143122132121), we get a palindrome (264353353462).

The spelling of 121231221341 in words is "one hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred forty-one".