1021210120220 has 48 divisors (see below), whose sum is σ = 2159691871680. Its totient is φ = 405603454464.

The previous prime is 1021210120211. The next prime is 1021210120241. The reversal of 1021210120220 is 220210121201.

It is a junction number, because it is equal to n+sod(n) for n = 1021210120195 and 1021210120204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2966426 + ... + 3292734.

It is an arithmetic number, because the mean of its divisors is an integer number (44993580660).

Almost surely, 2^{1021210120220} is an apocalyptic number.

1021210120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021210120220 is an abundant number, since it is smaller than the sum of its proper divisors (1138481751460).

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

1021210120220 is a wasteful number, since it uses less digits than its factorization.

1021210120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327422 (or 327420 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021210120220 its reverse (220210121201), we get a palindrome (1241420241421).

The spelling of 1021210120220 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred twenty thousand, two hundred twenty".