1021120221220 has 24 divisors (see below), whose sum is σ = 2339293598208. Its totient is φ = 371316444000.

The previous prime is 1021120221217. The next prime is 1021120221323. The reversal of 1021120221220 is 221220211201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021120221194 and 1021120221203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2320727556 + ... + 2320727995.

It is an arithmetic number, because the mean of its divisors is an integer number (97470566592).

Almost surely, 2^{1021120221220} is an apocalyptic number.

1021120221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021120221220 is an abundant number, since it is smaller than the sum of its proper divisors (1318173376988).

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

1021120221220 is a wasteful number, since it uses less digits than its factorization.

1021120221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641455571 (or 4641455569 counting only the distinct ones).

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

Adding to 1021120221220 its reverse (221220211201), we get a palindrome (1242340432421).

The spelling of 1021120221220 in words is "one trillion, twenty-one billion, one hundred twenty million, two hundred twenty-one thousand, two hundred twenty".