121311402212 has 360 divisors, whose sum is σ = 308962442880. Its totient is φ = 40663434240.

The previous prime is 121311402211. The next prime is 121311402253. The reversal of 121311402212 is 212204113121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121311402211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1177780553 + ... + 1177780655.

It is an arithmetic number, because the mean of its divisors is an integer number (858229008).

Almost surely, 2^121311402212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121311402212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154481221440).

121311402212 is an abundant number, since it is smaller than the sum of its proper divisors (187651040668).

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

121311402212 is a wasteful number, since it uses less digits than its factorization.

121311402212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121311402212 its reverse (212204113121), we get a palindrome (333515515333).

The spelling of 121311402212 in words is "one hundred twenty-one billion, three hundred eleven million, four hundred two thousand, two hundred twelve".