121211302122 has 128 divisors (see below), whose sum is σ = 285101752320. Its totient is φ = 38094851520.

The previous prime is 121211302111. The next prime is 121211302187. The reversal of 121211302122 is 221203112121.

It is a super-2 number, since 2×121211302122² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121211302095 and 121211302104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57417847 + ... + 57419957.

It is an arithmetic number, because the mean of its divisors is an integer number (2227357440).

Almost surely, 2^121211302122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121211302122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142550876160).

121211302122 is an abundant number, since it is smaller than the sum of its proper divisors (163890450198).

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

121211302122 is a wasteful number, since it uses less digits than its factorization.

121211302122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121211302122 its reverse (221203112121), we get a palindrome (342414414243).

The spelling of 121211302122 in words is "one hundred twenty-one billion, two hundred eleven million, three hundred two thousand, one hundred twenty-two".