2011102021 has 4 divisors (see below), whose sum is σ = 2024599500. Its totient is φ = 1997604544.

The previous prime is 2011102007. The next prime is 2011102031. The reversal of 2011102021 is 1202011102.

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 1308268900 + 702833121 = 36170^2 + 26511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011102021 - 2⁹ = 2011101509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011101989 and 2011102007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011102031) 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, 6748516 + ... + 6748813.

It is an arithmetic number, because the mean of its divisors is an integer number (506149875).

Almost surely, 2^2011102021 is an apocalyptic number.

It is an amenable number.

2011102021 is a deficient number, since it is larger than the sum of its proper divisors (13497479).

2011102021 is a wasteful number, since it uses less digits than its factorization.

2011102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13497478.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2011102021 is about 44845.3121407355. The cubic root of 2011102021 is about 1262.2480278242.

Adding to 2011102021 its reverse (1202011102), we get a palindrome (3213113123).

The spelling of 2011102021 in words is "two billion, eleven million, one hundred two thousand, twenty-one".