1012021221020 has 48 divisors (see below), whose sum is σ = 2287148488128. Its totient is φ = 374750376960.

The previous prime is 1012021220971. The next prime is 1012021221023. The reversal of 1012021221020 is 201221202101.

1012021221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1012021220986 and 1012021221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012021221023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24377072 + ... + 24418551.

It is an arithmetic number, because the mean of its divisors is an integer number (47648926836).

Almost surely, 2^{1012021221020} is an apocalyptic number.

1012021221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012021221020 is an abundant number, since it is smaller than the sum of its proper divisors (1275127267108).

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

1012021221020 is a wasteful number, since it uses less digits than its factorization.

1012021221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48795710 (or 48795708 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1012021221020 its reverse (201221202101), we get a palindrome (1213242423121).

The spelling of 1012021221020 in words is "one trillion, twelve billion, twenty-one million, two hundred twenty-one thousand, twenty".