121220001112210 has 288 divisors, whose sum is σ = 297079139185920. Its totient is φ = 34844125155840.

The previous prime is 121220001112123. The next prime is 121220001112229. The reversal of 121220001112210 is 12211100022121.

It is a super-2 number, since 2×121220001112210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1564514251 + ... + 1564591729.

It is an arithmetic number, because the mean of its divisors is an integer number (1031524788840).

Almost surely, 2^{121220001112210} is an apocalyptic number.

121220001112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220001112210 is an abundant number, since it is smaller than the sum of its proper divisors (175859138073710).

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

121220001112210 is a wasteful number, since it uses less digits than its factorization.

121220001112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78634 (or 78610 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121220001112210 its reverse (12211100022121), we get a palindrome (133431101134331).

The spelling of 121220001112210 in words is "one hundred twenty-one trillion, two hundred twenty billion, one million, one hundred twelve thousand, two hundred ten".