121202211222 has 128 divisors (see below), whose sum is σ = 280159948800. Its totient is φ = 38818061568.

The previous prime is 121202211203. The next prime is 121202211223. The reversal of 121202211222 is 222112202121.

It is a happy number.

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 = 121202211195 and 121202211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202211223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27252603 + ... + 27257049.

It is an arithmetic number, because the mean of its divisors is an integer number (2188749600).

Almost surely, 2^121202211222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121202211222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140079974400).

121202211222 is an abundant number, since it is smaller than the sum of its proper divisors (158957737578).

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

121202211222 is a wasteful number, since it uses less digits than its factorization.

121202211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4707 (or 4701 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121202211222 its reverse (222112202121), we get a palindrome (343314413343).

The spelling of 121202211222 in words is "one hundred twenty-one billion, two hundred two million, two hundred eleven thousand, two hundred twenty-two".