1021220022020 has 24 divisors (see below), whose sum is σ = 2339522232768. Its totient is φ = 371352735200.

The previous prime is 1021220022019. The next prime is 1021220022041. The reversal of 1021220022020 is 202200221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021220021986 and 1021220022004.

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, 2320954376 + ... + 2320954815.

It is an arithmetic number, because the mean of its divisors is an integer number (97480093032).

Almost surely, 2^{1021220022020} is an apocalyptic number.

1021220022020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021220022020 is an abundant number, since it is smaller than the sum of its proper divisors (1318302210748).

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

1021220022020 is a wasteful number, since it uses less digits than its factorization.

1021220022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641909211 (or 4641909209 counting only the distinct ones).

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

Adding to 1021220022020 its reverse (202200221201), we get a palindrome (1223420243221).

The spelling of 1021220022020 in words is "one trillion, twenty-one billion, two hundred twenty million, twenty-two thousand, twenty".