1021001122220 has 48 divisors (see below), whose sum is σ = 2264279996160. Its totient is φ = 385937340096.

The previous prime is 1021001122213. The next prime is 1021001122237. The reversal of 1021001122220 is 222211001201.

1021001122220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1021001122195 and 1021001122204.

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, 13332710 + ... + 13409069.

It is an arithmetic number, because the mean of its divisors is an integer number (47172499920).

Almost surely, 2^{1021001122220} is an apocalyptic number.

1021001122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021001122220 is an abundant number, since it is smaller than the sum of its proper divisors (1243278873940).

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

1021001122220 is a wasteful number, since it uses less digits than its factorization.

1021001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26741894 (or 26741892 counting only the distinct ones).

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

Adding to 1021001122220 its reverse (222211001201), we get a palindrome (1243212123421).

The spelling of 1021001122220 in words is "one trillion, twenty-one billion, one million, one hundred twenty-two thousand, two hundred twenty".