1210111202020 has 72 divisors (see below), whose sum is σ = 2958166774584. Its totient is φ = 414609237504.

The previous prime is 1210111202017. The next prime is 1210111202021. The reversal of 1210111202020 is 202021110121.

It can be written as a sum of positive squares in 4 ways, for example, as 366935485504 + 843175716516 = 605752^2 + 918246^2 .

It is not an unprimeable number, because it can be changed into a prime (1210111202021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 999024 + ... + 1848856.

It is an arithmetic number, because the mean of its divisors is an integer number (41085649647).

Almost surely, 2^{1210111202020} is an apocalyptic number.

1210111202020 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 1210111202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1479083387292).

1210111202020 is an abundant number, since it is smaller than the sum of its proper divisors (1748055572564).

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

1210111202020 is a wasteful number, since it uses less digits than its factorization.

1210111202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851309 (or 851300 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1210111202020 its reverse (202021110121), we get a palindrome (1412132312141).

The spelling of 1210111202020 in words is "one trillion, two hundred ten billion, one hundred eleven million, two hundred two thousand, twenty".