1001011011020 has 24 divisors (see below), whose sum is σ = 2102469520704. Its totient is φ = 400338423936.

The previous prime is 1001011010933. The next prime is 1001011011023. The reversal of 1001011011020 is 201101101001.

It is a happy number.

It is a super-2 number, since 2×1001011011020² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001011010989 and 1001011011007.

It is not an unprimeable number, because it can be changed into a prime (1001011011023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3999284 + ... + 4242203.

It is an arithmetic number, because the mean of its divisors is an integer number (87602896696).

Almost surely, 2^{1001011011020} is an apocalyptic number.

1001011011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001011011020 is an abundant number, since it is smaller than the sum of its proper divisors (1101458509684).

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

1001011011020 is a wasteful number, since it uses less digits than its factorization.

1001011011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8247569 (or 8247567 counting only the distinct ones).

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

Adding to 1001011011020 its reverse (201101101001), we get a palindrome (1202112112021).

The spelling of 1001011011020 in words is "one trillion, one billion, eleven million, eleven thousand, twenty".