122102456261 has 4 divisors (see below), whose sum is σ = 122161933452. Its totient is φ = 122042979072.

The previous prime is 122102456239. The next prime is 122102456291. The reversal of 122102456261 is 162654201221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162654201221 = 20047 ⋅8113643.

It can be written as a sum of positive squares in 2 ways, for example, as 83886116161 + 38216340100 = 289631^2 + 195490^2 .

It is a cyclic number.

It is not a de Polignac number, because 122102456261 - 2²⁶ = 122035347397 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 (122102456221) 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, 29735516 + ... + 29739621.

It is an arithmetic number, because the mean of its divisors is an integer number (30540483363).

Almost surely, 2^122102456261 is an apocalyptic number.

It is an amenable number.

122102456261 is a deficient number, since it is larger than the sum of its proper divisors (59477191).

122102456261 is an equidigital number, since it uses as much as digits as its factorization.

122102456261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59477190.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 122102456261 its reverse (162654201221), we get a palindrome (284756657482).

The spelling of 122102456261 in words is "one hundred twenty-two billion, one hundred two million, four hundred fifty-six thousand, two hundred sixty-one".