121220022210210 has 1280 divisors, whose sum is σ = 431778138624000. Its totient is φ = 23953017876480.

The previous prime is 121220022210163. The next prime is 121220022210271. The reversal of 121220022210210 is 12012220022121.

It is a happy number.

121220022210210 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 0 + 22 + 210 + 210 = 666.

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 639 ways as a sum of consecutive naturals, for example, 29358201426 + ... + 29358205554.

It is an arithmetic number, because the mean of its divisors is an integer number (337326670800).

Almost surely, 2^{121220022210210} is an apocalyptic number.

121220022210210 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 121220022210210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215889069312000).

121220022210210 is an abundant number, since it is smaller than the sum of its proper divisors (310558116413790).

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

121220022210210 is a wasteful number, since it uses less digits than its factorization.

121220022210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386 (or 4359 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121220022210210 its reverse (12012220022121), we get a palindrome (133232242232331).

The spelling of 121220022210210 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-two million, two hundred ten thousand, two hundred ten".