1021012222220 has 24 divisors (see below), whose sum is σ = 2256974386800. Its totient is φ = 386909894592.

The previous prime is 1021012222193. The next prime is 1021012222271. The reversal of 1021012222220 is 222222101201.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1343436755 + ... + 1343437514.

It is an arithmetic number, because the mean of its divisors is an integer number (94040599450).

Almost surely, 2^{1021012222220} is an apocalyptic number.

1021012222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021012222220 is an abundant number, since it is smaller than the sum of its proper divisors (1235962164580).

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

1021012222220 is a wasteful number, since it uses less digits than its factorization.

1021012222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686874297 (or 2686874295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1021012222220 its reverse (222222101201), we get a palindrome (1243234323421).

The spelling of 1021012222220 in words is "one trillion, twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred twenty".