121442240401 has 4 divisors (see below), whose sum is σ = 121467146292. Its totient is φ = 121417334512.

The previous prime is 121442240303. The next prime is 121442240459. The reversal of 121442240401 is 104042244121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104042244121 = 157 ⋅662689453.

It can be written as a sum of positive squares in 2 ways, for example, as 69000782400 + 52441458001 = 262680^2 + 229001^2 .

It is a cyclic number.

It is not a de Polignac number, because 121442240401 - 2⁹ = 121442239889 is a prime.

It is a super-2 number, since 2×121442240401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121442240201) 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, 12445630 + ... + 12455383.

It is an arithmetic number, because the mean of its divisors is an integer number (30366786573).

Almost surely, 2^121442240401 is an apocalyptic number.

It is an amenable number.

121442240401 is a deficient number, since it is larger than the sum of its proper divisors (24905891).

121442240401 is an equidigital number, since it uses as much as digits as its factorization.

121442240401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24905890.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 121442240401 its reverse (104042244121), we get a palindrome (225484484522).

The spelling of 121442240401 in words is "one hundred twenty-one billion, four hundred forty-two million, two hundred forty thousand, four hundred one".