121223513141 has 4 divisors (see below), whose sum is σ = 123510749292. Its totient is φ = 118936276992.

The previous prime is 121223513129. The next prime is 121223513143. The reversal of 121223513141 is 141315322121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87052142116 + 34171371025 = 295046^2 + 184855^2 .

It is a cyclic number.

It is not a de Polignac number, because 121223513141 - 2²⁶ = 121156404277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121223513141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223513143) 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 3 ways as a sum of consecutive naturals, for example, 1143617996 + ... + 1143618101.

It is an arithmetic number, because the mean of its divisors is an integer number (30877687323).

Almost surely, 2^121223513141 is an apocalyptic number.

It is an amenable number.

121223513141 is a deficient number, since it is larger than the sum of its proper divisors (2287236151).

121223513141 is an equidigital number, since it uses as much as digits as its factorization.

121223513141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287236150.

The product of its digits is 1440, while the sum is 26.

Adding to 121223513141 its reverse (141315322121), we get a palindrome (262538835262).

The spelling of 121223513141 in words is "one hundred twenty-one billion, two hundred twenty-three million, five hundred thirteen thousand, one hundred forty-one".