1011023200020 has 96 divisors (see below), whose sum is σ = 2893906028160. Its totient is φ = 263653378560.

The previous prime is 1011023199961. The next prime is 1011023200079. The reversal of 1011023200020 is 200023201101.

It is an interprime number because it is at equal distance from previous prime (1011023199961) and next prime (1011023200079).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1011023199969 and 1011023200005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165190 + ... + 1431549.

It is an arithmetic number, because the mean of its divisors is an integer number (30144854460).

Almost surely, 2^{1011023200020} is an apocalyptic number.

1011023200020 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 1011023200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446953014080).

1011023200020 is an abundant number, since it is smaller than the sum of its proper divisors (1882882828140).

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

1011023200020 is a wasteful number, since it uses less digits than its factorization.

1011023200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596985 (or 1596983 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1011023200020 its reverse (200023201101), we get a palindrome (1211046401121).

The spelling of 1011023200020 in words is "one trillion, eleven billion, twenty-three million, two hundred thousand, twenty".