1011210200020 has 24 divisors (see below), whose sum is σ = 2132655341544. Its totient is φ = 402748094976.

The previous prime is 1011210200017. The next prime is 1011210200027. The reversal of 1011210200020 is 200020121101.

It can be written as a sum of positive squares in 4 ways, for example, as 3166087824 + 1008044112196 = 56268^2 + 1004014^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011210200027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108494289 + ... + 108503608.

It is an arithmetic number, because the mean of its divisors is an integer number (88860639231).

Almost surely, 2^{1011210200020} is an apocalyptic number.

1011210200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011210200020 is an abundant number, since it is smaller than the sum of its proper divisors (1121445141524).

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

1011210200020 is a wasteful number, since it uses less digits than its factorization.

1011210200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216998139 (or 216998137 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1011210200020 its reverse (200020121101), we get a palindrome (1211230321121).

The spelling of 1011210200020 in words is "one trillion, eleven billion, two hundred ten million, two hundred thousand, twenty".