121231101222 has 320 divisors, whose sum is σ = 347679889920. Its totient is φ = 30662323200.

The previous prime is 121231101221. The next prime is 121231101247. The reversal of 121231101222 is 222101132121.

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 = 121231101195 and 121231101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231101221) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 81417054 + ... + 81418542.

It is an arithmetic number, because the mean of its divisors is an integer number (1086499656).

Almost surely, 2^121231101222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121231101222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173839944960).

121231101222 is an abundant number, since it is smaller than the sum of its proper divisors (226448788698).

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

121231101222 is a wasteful number, since it uses less digits than its factorization.

121231101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1680 counting only the distinct ones).

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

Adding to 121231101222 its reverse (222101132121), we get a palindrome (343332233343).

The spelling of 121231101222 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred one thousand, two hundred twenty-two".