1011220202020 has 216 divisors, whose sum is σ = 2594215620864. Its totient is φ = 330105105792.

The previous prime is 1011220201993. The next prime is 1011220202023. The reversal of 1011220202020 is 202020221101.

It is a happy number.

1011220202020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1011220202020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011220202023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 115603287 + ... + 115612033.

It is an arithmetic number, because the mean of its divisors is an integer number (12010257504).

Almost surely, 2^{1011220202020} is an apocalyptic number.

1011220202020 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 1011220202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1297107810432).

1011220202020 is an abundant number, since it is smaller than the sum of its proper divisors (1582995418844).

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

1011220202020 is a wasteful number, since it uses less digits than its factorization.

1011220202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9039 (or 9007 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1011220202020 its reverse (202020221101), we get a palindrome (1213240423121).

The spelling of 1011220202020 in words is "one trillion, eleven billion, two hundred twenty million, two hundred two thousand, twenty".