121244335557 has 8 divisors (see below), whose sum is σ = 163873622784. Its totient is φ = 79722302688.

The previous prime is 121244335543. The next prime is 121244335567. The reversal of 121244335557 is 755533442121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121244335557 - 2⁶ = 121244335493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244335567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276813333 + ... + 276813770.

It is an arithmetic number, because the mean of its divisors is an integer number (20484202848).

Almost surely, 2^121244335557 is an apocalyptic number.

It is an amenable number.

121244335557 is a deficient number, since it is larger than the sum of its proper divisors (42629287227).

121244335557 is an equidigital number, since it uses as much as digits as its factorization.

121244335557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553627179.

The product of its digits is 504000, while the sum is 42.

Adding to 121244335557 its reverse (755533442121), we get a palindrome (876777777678).

The spelling of 121244335557 in words is "one hundred twenty-one billion, two hundred forty-four million, three hundred thirty-five thousand, five hundred fifty-seven".