1021102020 has 72 divisors (see below), whose sum is σ = 3232022976. Its totient is φ = 260453952.

The previous prime is 1021102003. The next prime is 1021102051. The reversal of 1021102020 is 202011201.

1021102020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1021101993 and 1021102011.

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 23 ways as a sum of consecutive naturals, for example, 119182 + ... + 127461.

It is an arithmetic number, because the mean of its divisors is an integer number (44889208).

Almost surely, 2^1021102020 is an apocalyptic number.

1021102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021102020 is an abundant number, since it is smaller than the sum of its proper divisors (2210920956).

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

1021102020 is a wasteful number, since it uses less digits than its factorization.

1021102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246681 (or 246676 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021102020 is about 31954.6869801599. The cubic root of 1021102020 is about 1006.9851014200.

Adding to 1021102020 its reverse (202011201), we get a palindrome (1223113221).

It can be divided in two parts, 1021 and 102020, that added together give a square (103041 = 321²).

The spelling of 1021102020 in words is "one billion, twenty-one million, one hundred two thousand, twenty".