2011020111013 has 4 divisors (see below), whose sum is σ = 2011027656268. Its totient is φ = 2011012565760.

The previous prime is 2011020110989. The next prime is 2011020111019. The reversal of 2011020111013 is 3101110201102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 804937335489 + 1206082775524 = 897183^2 + 1098218^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011020111013 - 2²¹ = 2011018013861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011020110984 and 2011020111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011020111019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3357618 + ... + 3910963.

It is an arithmetic number, because the mean of its divisors is an integer number (502756914067).

Almost surely, 2^{2011020111013} is an apocalyptic number.

It is an amenable number.

2011020111013 is a deficient number, since it is larger than the sum of its proper divisors (7545255).

2011020111013 is an equidigital number, since it uses as much as digits as its factorization.

2011020111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7545254.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 2011020111013 its reverse (3101110201102), we get a palindrome (5112130312115).

The spelling of 2011020111013 in words is "two trillion, eleven billion, twenty million, one hundred eleven thousand, thirteen".