121124435021 has 4 divisors (see below), whose sum is σ = 121155440832. Its totient is φ = 121093429212.

The previous prime is 121124435017. The next prime is 121124435087. The reversal of 121124435021 is 120534421121.

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: 120534421121 = 29 ⋅4156359349.

It is a cyclic number.

It is not a de Polignac number, because 121124435021 - 2² = 121124435017 is a prime.

It is a super-2 number, since 2×121124435021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121124435011) 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, 15497045 + ... + 15504858.

It is an arithmetic number, because the mean of its divisors is an integer number (30288860208).

Almost surely, 2^121124435021 is an apocalyptic number.

It is an amenable number.

121124435021 is a deficient number, since it is larger than the sum of its proper divisors (31005811).

121124435021 is an equidigital number, since it uses as much as digits as its factorization.

121124435021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31005810.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 121124435021 its reverse (120534421121), we get a palindrome (241658856142).

The spelling of 121124435021 in words is "one hundred twenty-one billion, one hundred twenty-four million, four hundred thirty-five thousand, twenty-one".