2661220122102 has 32 divisors (see below), whose sum is σ = 5914363932000. Its totient is φ = 886992158304.

The previous prime is 2661220122097. The next prime is 2661220122109. The reversal of 2661220122102 is 2012210221662.

2661220122102 is a `hidden beast` number, since 2 + 6 + 612 + 20 + 1 + 2 + 21 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661220122109) 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, 1659273 + ... + 2841764.

It is an arithmetic number, because the mean of its divisors is an integer number (184823872875).

Almost surely, 2^{2661220122102} is an apocalyptic number.

2661220122102 is an abundant number, since it is smaller than the sum of its proper divisors (3253143809898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661220122102 is a wasteful number, since it uses less digits than its factorization.

2661220122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511997 (or 4511991 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 2661220122102 its reverse (2012210221662), we get a palindrome (4673430343764).

The spelling of 2661220122102 in words is "two trillion, six hundred sixty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred two".