121611453465 has 16 divisors (see below), whose sum is σ = 195817681728. Its totient is φ = 64446323136.

The previous prime is 121611453449. The next prime is 121611453493. The reversal of 121611453465 is 564354116121.

It is not a de Polignac number, because 121611453465 - 2⁴ = 121611453449 is a prime.

It is a super-2 number, since 2×121611453465² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25817487 + ... + 25822196.

It is an arithmetic number, because the mean of its divisors is an integer number (12238605108).

Almost surely, 2^121611453465 is an apocalyptic number.

121611453465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121611453465 is a deficient number, since it is larger than the sum of its proper divisors (74206228263).

121611453465 is a wasteful number, since it uses less digits than its factorization.

121611453465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51639848.

The product of its digits is 86400, while the sum is 39.

Adding to 121611453465 its reverse (564354116121), we get a palindrome (685965569586).

The spelling of 121611453465 in words is "one hundred twenty-one billion, six hundred eleven million, four hundred fifty-three thousand, four hundred sixty-five".