1021210222120 has 256 divisors, whose sum is σ = 2641429440000. Its totient is φ = 351710515200.

The previous prime is 1021210222111. The next prime is 1021210222237. The reversal of 1021210222120 is 212220121201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021210222094 and 1021210222103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 586564450 + ... + 586566190.

It is an arithmetic number, because the mean of its divisors is an integer number (10318083750).

Almost surely, 2^{1021210222120} is an apocalyptic number.

1021210222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021210222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320714720000).

1021210222120 is an abundant number, since it is smaller than the sum of its proper divisors (1620219217880).

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

1021210222120 is a wasteful number, since it uses less digits than its factorization.

1021210222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324 (or 2320 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021210222120 its reverse (212220121201), we get a palindrome (1233430343321).

The spelling of 1021210222120 in words is "one trillion, twenty-one billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty".