121302655423 has 16 divisors (see below), whose sum is σ = 133286316480. Its totient is φ = 109882533376.

The previous prime is 121302655421. The next prime is 121302655433. The reversal of 121302655423 is 324556203121.

It is a cyclic number.

It is not a de Polignac number, because 121302655423 - 2¹ = 121302655421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302655421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231811 + ... + 544372.

It is an arithmetic number, because the mean of its divisors is an integer number (8330394780).

Almost surely, 2^121302655423 is an apocalyptic number.

121302655423 is a deficient number, since it is larger than the sum of its proper divisors (11983661057).

121302655423 is a wasteful number, since it uses less digits than its factorization.

121302655423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776546.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 121302655423 its reverse (324556203121), we get a palindrome (445858858544).

The spelling of 121302655423 in words is "one hundred twenty-one billion, three hundred two million, six hundred fifty-five thousand, four hundred twenty-three".