1011111222020 has 24 divisors (see below), whose sum is σ = 2125727440704. Its totient is φ = 403988512736.

The previous prime is 1011111221977. The next prime is 1011111222059. The reversal of 1011111222020 is 202221111101.

It is a super-3 number, since 3×1011111222020³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1011111221986 and 1011111222004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28480322 + ... + 28515801.

It is an arithmetic number, because the mean of its divisors is an integer number (88571976696).

Almost surely, 2^{1011111222020} is an apocalyptic number.

1011111222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011111222020 is an abundant number, since it is smaller than the sum of its proper divisors (1114616218684).

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

1011111222020 is a wasteful number, since it uses less digits than its factorization.

1011111222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56997019 (or 56997017 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011111222020 its reverse (202221111101), we get a palindrome (1213332333121).

The spelling of 1011111222020 in words is "one trillion, eleven billion, one hundred eleven million, two hundred twenty-two thousand, twenty".