121311224442102 has 32 divisors (see below), whose sum is σ = 243396049730400. Its totient is φ = 40308149968128.

The previous prime is 121311224442097. The next prime is 121311224442103. The reversal of 121311224442102 is 201244422113121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121311224442102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311224442103) 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, 55975674 + ... + 58102482.

It is an arithmetic number, because the mean of its divisors is an integer number (7606126554075).

Almost surely, 2^{121311224442102} is an apocalyptic number.

121311224442102 is an abundant number, since it is smaller than the sum of its proper divisors (122084825288298).

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

121311224442102 is a wasteful number, since it uses less digits than its factorization.

121311224442102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157120.

The product of its (nonzero) digits is 6144, while the sum is 30.

Adding to 121311224442102 its reverse (201244422113121), we get a palindrome (322555646555223).

The spelling of 121311224442102 in words is "one hundred twenty-one trillion, three hundred eleven billion, two hundred twenty-four million, four hundred forty-two thousand, one hundred two".