121220221112010 has 96 divisors (see below), whose sum is σ = 316286732361600. Its totient is φ = 32211178049664.

The previous prime is 121220221112009. The next prime is 121220221112027. The reversal of 121220221112010 is 10211122022121.

121220221112010 is a `hidden beast` number, since 1 + 21 + 220 + 221 + 1 + 1 + 201 + 0 = 666.

121220221112010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99498016 + ... + 100708964.

It is an arithmetic number, because the mean of its divisors is an integer number (3294653462100).

Almost surely, 2^{121220221112010} is an apocalyptic number.

121220221112010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220221112010 is an abundant number, since it is smaller than the sum of its proper divisors (195066511249590).

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

121220221112010 is a wasteful number, since it uses less digits than its factorization.

121220221112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214892 (or 1214889 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121220221112010 its reverse (10211122022121), we get a palindrome (131431343134131).

The spelling of 121220221112010 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twelve thousand, ten".