1021020022220 has 96 divisors (see below), whose sum is σ = 2397462036480. Its totient is φ = 362067575040.

The previous prime is 1021020022207. The next prime is 1021020022223. The reversal of 1021020022220 is 222200201201.

It is a junction number, because it is equal to n+sod(n) for n = 1021020022195 and 1021020022204.

It is not an unprimeable number, because it can be changed into a prime (1021020022223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2685941 + ... + 3042419.

It is an arithmetic number, because the mean of its divisors is an integer number (24973562880).

Almost surely, 2^{1021020022220} is an apocalyptic number.

1021020022220 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 1021020022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198731018240).

1021020022220 is an abundant number, since it is smaller than the sum of its proper divisors (1376442014260).

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

1021020022220 is a wasteful number, since it uses less digits than its factorization.

1021020022220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356823 (or 356821 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1021020022220 its reverse (222200201201), we get a palindrome (1243220223421).

The spelling of 1021020022220 in words is "one trillion, twenty-one billion, twenty million, twenty-two thousand, two hundred twenty".