1021122201020 has 72 divisors (see below), whose sum is σ = 2222040138864. Its totient is φ = 394153062912.

The previous prime is 1021122201007. The next prime is 1021122201023. The reversal of 1021122201020 is 201022211201.

It is a junction number, because it is equal to n+sod(n) for n = 1021122200986 and 1021122201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122201023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33406064 + ... + 33436616.

Almost surely, 2^{1021122201020} is an apocalyptic number.

1021122201020 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 1021122201020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111020069432).

1021122201020 is an abundant number, since it is smaller than the sum of its proper divisors (1200917937844).

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

1021122201020 is a wasteful number, since it uses less digits than its factorization.

1021122201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32607 (or 32576 counting only the distinct ones).

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

Adding to 1021122201020 its reverse (201022211201), we get a palindrome (1222144412221).

The spelling of 1021122201020 in words is "one trillion, twenty-one billion, one hundred twenty-two million, two hundred one thousand, twenty".