121243040411 has 4 divisors (see below), whose sum is σ = 121474863192. Its totient is φ = 121011217632.

The previous prime is 121243040383. The next prime is 121243040419. The reversal of 121243040411 is 114040342121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114040342121 = 14519 ⋅7854559.

It is a cyclic number.

It is not a de Polignac number, because 121243040411 - 2¹⁴ = 121243024027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121243040419) 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, 115910606 + ... + 115911651.

It is an arithmetic number, because the mean of its divisors is an integer number (30368715798).

Almost surely, 2^121243040411 is an apocalyptic number.

121243040411 is a deficient number, since it is larger than the sum of its proper divisors (231822781).

121243040411 is an equidigital number, since it uses as much as digits as its factorization.

121243040411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231822780.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121243040411 its reverse (114040342121), we get a palindrome (235283382532).

The spelling of 121243040411 in words is "one hundred twenty-one billion, two hundred forty-three million, forty thousand, four hundred eleven".