1012201020020 has 24 divisors (see below), whose sum is σ = 2125651605000. Its totient is φ = 404874796032.

The previous prime is 1012201019993. The next prime is 1012201020059. The reversal of 1012201020020 is 200201022101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 490509732496 + 521691287524 = 700364^2 + 722282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1012201019983 and 1012201020010.

It is a congruent number.

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, 1323056 + ... + 1942904.

It is an arithmetic number, because the mean of its divisors is an integer number (88568816875).

Almost surely, 2^{1012201020020} is an apocalyptic number.

1012201020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012201020020 is an abundant number, since it is smaller than the sum of its proper divisors (1113450584980).

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

1012201020020 is a wasteful number, since it uses less digits than its factorization.

1012201020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701507 (or 701505 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1012201020020 its reverse (200201022101), we get a palindrome (1212402042121).

The spelling of 1012201020020 in words is "one trillion, twelve billion, two hundred one million, twenty thousand, twenty".