121022553305 has 4 divisors (see below), whose sum is σ = 145227063972. Its totient is φ = 96818042640.

The previous prime is 121022553293. The next prime is 121022553331. The reversal of 121022553305 is 503355220121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503355220121 = 13 ⋅38719632317.

It can be written as a sum of positive squares in 2 ways, for example, as 19870567369 + 101151985936 = 140963^2 + 318044^2 .

It is not a de Polignac number, because 121022553305 - 2¹⁰ = 121022552281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12102255326 + ... + 12102255335.

It is an arithmetic number, because the mean of its divisors is an integer number (36306765993).

Almost surely, 2^121022553305 is an apocalyptic number.

It is an amenable number.

121022553305 is a deficient number, since it is larger than the sum of its proper divisors (24204510667).

121022553305 is an equidigital number, since it uses as much as digits as its factorization.

121022553305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24204510666.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 121022553305 its reverse (503355220121), we get a palindrome (624377773426).

The spelling of 121022553305 in words is "one hundred twenty-one billion, twenty-two million, five hundred fifty-three thousand, three hundred five".