2011001020020 has 96 divisors (see below), whose sum is σ = 6257688460800. Its totient is φ = 536160580992.

The previous prime is 2011001020019. The next prime is 2011001020037. The reversal of 2011001020020 is 200201001102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2011001019984 and 2011001020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2374821 + ... + 3108339.

It is an arithmetic number, because the mean of its divisors is an integer number (65184254800).

Almost surely, 2^{2011001020020} is an apocalyptic number.

2011001020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011001020020 is an abundant number, since it is smaller than the sum of its proper divisors (4246687440780).

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

2011001020020 is a wasteful number, since it uses less digits than its factorization.

2011001020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738614 (or 738606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2011001020020 its reverse (200201001102), we get a palindrome (2211202021122).

The spelling of 2011001020020 in words is "two trillion, eleven billion, one million, twenty thousand, twenty".