201011011001020 has 24 divisors (see below), whose sum is σ = 460497952475568. Its totient is φ = 73094913091200.

The previous prime is 201011011000979. The next prime is 201011011001023. The reversal of 201011011001020 is 20100110110102.

201011011001020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 201011011000988 and 201011011001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201011011001023) 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, 456843206601 + ... + 456843207040.

It is an arithmetic number, because the mean of its divisors is an integer number (19187414686482).

Almost surely, 2^{201011011001020} is an apocalyptic number.

201011011001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201011011001020 is an abundant number, since it is smaller than the sum of its proper divisors (259486941474548).

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

201011011001020 is a wasteful number, since it uses less digits than its factorization.

201011011001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913686413661 (or 913686413659 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 201011011001020 its reverse (20100110110102), we get a palindrome (221111121111122).

The spelling of 201011011001020 in words is "two hundred one trillion, eleven billion, eleven million, one thousand, twenty".