121244001121 has 4 divisors (see below), whose sum is σ = 121254552832. Its totient is φ = 121233449412.

The previous prime is 121244001091. The next prime is 121244001127. The reversal of 121244001121 is 121100442121.

It is a happy number.

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: 121100442121 = 137 ⋅883944833.

It is a cyclic number.

It is not a de Polignac number, because 121244001121 - 2¹⁹ = 121243476833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121244001127) 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, 5258601 + ... + 5281606.

It is an arithmetic number, because the mean of its divisors is an integer number (30313638208).

Almost surely, 2^121244001121 is an apocalyptic number.

It is an amenable number.

121244001121 is a deficient number, since it is larger than the sum of its proper divisors (10551711).

121244001121 is a wasteful number, since it uses less digits than its factorization.

121244001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10551710.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121244001121 its reverse (121100442121), we get a palindrome (242344443242).

The spelling of 121244001121 in words is "one hundred twenty-one billion, two hundred forty-four million, one thousand, one hundred twenty-one".