1011011001020 has 24 divisors (see below), whose sum is σ = 2123276878800. Its totient is φ = 404375109632.

The previous prime is 1011011000983. The next prime is 1011011001047. The reversal of 1011011001020 is 201001101101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1011011000989 and 1011011001007.

It is a congruent number.

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, 1546565 + ... + 2100924.

It is an arithmetic number, because the mean of its divisors is an integer number (88469869950).

Almost surely, 2^{1011011001020} is an apocalyptic number.

1011011001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011011001020 is an abundant number, since it is smaller than the sum of its proper divisors (1112265877780).

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

1011011001020 is a wasteful number, since it uses less digits than its factorization.

1011011001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661357 (or 3661355 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1011011001020 its reverse (201001101101), we get a palindrome (1212012102121).

The spelling of 1011011001020 in words is "one trillion, eleven billion, eleven million, one thousand, twenty".