121220022222210 has 128 divisors (see below), whose sum is σ = 306969369753600. Its totient is φ = 30551159577600.

The previous prime is 121220022222163. The next prime is 121220022222289. The reversal of 121220022222210 is 12222220022121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 411394435 + ... + 411688985.

It is an arithmetic number, because the mean of its divisors is an integer number (2398198201200).

Almost surely, 2^{121220022222210} is an apocalyptic number.

121220022222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220022222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153484684876800).

121220022222210 is an abundant number, since it is smaller than the sum of its proper divisors (185749347531390).

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

121220022222210 is a wasteful number, since it uses less digits than its factorization.

121220022222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296296.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 121220022222210 its reverse (12222220022121), we get a palindrome (133442242244331).

The spelling of 121220022222210 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-two million, two hundred twenty-two thousand, two hundred ten".