122661602155 has 4 divisors (see below), whose sum is σ = 147193922592. Its totient is φ = 98129281720.

The previous prime is 122661602153. The next prime is 122661602263. The reversal of 122661602155 is 551206166221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 122661602155 - 2¹ = 122661602153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122661602153) 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, 12266160211 + ... + 12266160220.

It is an arithmetic number, because the mean of its divisors is an integer number (36798480648).

Almost surely, 2^122661602155 is an apocalyptic number.

122661602155 is a deficient number, since it is larger than the sum of its proper divisors (24532320437).

122661602155 is an equidigital number, since it uses as much as digits as its factorization.

122661602155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24532320436.

The product of its (nonzero) digits is 43200, while the sum is 37.

Adding to 122661602155 its reverse (551206166221), we get a palindrome (673867768376).

The spelling of 122661602155 in words is "one hundred twenty-two billion, six hundred sixty-one million, six hundred two thousand, one hundred fifty-five".