1021202212020 has 192 divisors, whose sum is σ = 3008445511680. Its totient is φ = 258459683328.

The previous prime is 1021202211977. The next prime is 1021202212027. The reversal of 1021202212020 is 202122021201.

It is a super-3 number, since 3×1021202212020³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021202212027) 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 63 ways as a sum of consecutive naturals, for example, 56765467 + ... + 56783453.

It is an arithmetic number, because the mean of its divisors is an integer number (15668987040).

Almost surely, 2^{1021202212020} is an apocalyptic number.

1021202212020 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 1021202212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504222755840).

1021202212020 is an abundant number, since it is smaller than the sum of its proper divisors (1987243299660).

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

1021202212020 is a wasteful number, since it uses less digits than its factorization.

1021202212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18582 (or 18580 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1021202212020 its reverse (202122021201), we get a palindrome (1223324233221).

The spelling of 1021202212020 in words is "one trillion, twenty-one billion, two hundred two million, two hundred twelve thousand, twenty".