1021023131020 has 24 divisors (see below), whose sum is σ = 2166253203744. Its totient is φ = 404198846976.

The previous prime is 1021023130999. The next prime is 1021023131041. The reversal of 1021023131020 is 201313201201.

It is an interprime number because it is at equal distance from previous prime (1021023130999) and next prime (1021023131041).

It is a junction number, because it is equal to n+sod(n) for n = 1021023130985 and 1021023131003.

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, 263148352 + ... + 263152231.

It is an arithmetic number, because the mean of its divisors is an integer number (90260550156).

Almost surely, 2^{1021023131020} is an apocalyptic number.

1021023131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021023131020 is an abundant number, since it is smaller than the sum of its proper divisors (1145230072724).

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

1021023131020 is a wasteful number, since it uses less digits than its factorization.

1021023131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526300689 (or 526300687 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1021023131020 its reverse (201313201201), we get a palindrome (1222336332221).

The spelling of 1021023131020 in words is "one trillion, twenty-one billion, twenty-three million, one hundred thirty-one thousand, twenty".