121222112212110 has 256 divisors, whose sum is σ = 375254175744000. Its totient is φ = 24885274885632.

The previous prime is 121222112212049. The next prime is 121222112212169. The reversal of 121222112212110 is 11212211222121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7296430 + ... + 17195409.

It is an arithmetic number, because the mean of its divisors is an integer number (1465836624000).

Almost surely, 2^{121222112212110} is an apocalyptic number.

121222112212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121222112212110 is an abundant number, since it is smaller than the sum of its proper divisors (254032063531890).

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

121222112212110 is a wasteful number, since it uses less digits than its factorization.

121222112212110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24491920 (or 24491906 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121222112212110 its reverse (11212211222121), we get a palindrome (132434323434231).

The spelling of 121222112212110 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, two hundred twelve thousand, one hundred ten".