121120653361 has 4 divisors (see below), whose sum is σ = 122252622192. Its totient is φ = 119988684532.

The previous prime is 121120653323. The next prime is 121120653371. The reversal of 121120653361 is 163356021121.

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: 163356021121 = 17 ⋅9609177713.

It is a cyclic number.

It is not a de Polignac number, because 121120653361 - 2⁷ = 121120653233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121120653371) 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, 565984255 + ... + 565984468.

It is an arithmetic number, because the mean of its divisors is an integer number (30563155548).

Almost surely, 2^121120653361 is an apocalyptic number.

It is an amenable number.

121120653361 is a deficient number, since it is larger than the sum of its proper divisors (1131968831).

121120653361 is a wasteful number, since it uses less digits than its factorization.

121120653361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131968830.

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 121120653361 its reverse (163356021121), we get a palindrome (284476674482).

The spelling of 121120653361 in words is "one hundred twenty-one billion, one hundred twenty million, six hundred fifty-three thousand, three hundred sixty-one".