121022221012 has 192 divisors, whose sum is σ = 272988817920. Its totient is φ = 45591552000.

The previous prime is 121022220997. The next prime is 121022221027. The reversal of 121022221012 is 210122220121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121022220997) and next prime (121022221027).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 311110914 + ... + 311111302.

It is an arithmetic number, because the mean of its divisors is an integer number (1421816760).

Almost surely, 2^121022221012 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 121022221012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136494408960).

121022221012 is an abundant number, since it is smaller than the sum of its proper divisors (151966596908).

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

121022221012 is a wasteful number, since it uses less digits than its factorization.

121022221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121022221012 its reverse (210122220121), we get a palindrome (331144441133).

It can be divided in two parts, 1210 and 22221012, that added together give a palindrome (22222222).

The spelling of 121022221012 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, twelve".