2101220021011 has 4 divisors (see below), whose sum is σ = 2101338197712. Its totient is φ = 2101101844312.

The previous prime is 2101220020957. The next prime is 2101220021023. The reversal of 2101220021011 is 1101200221012.

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

It is a cyclic number.

It is not a de Polignac number, because 2101220021011 - 2¹⁹ = 2101219496723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101220020982 and 2101220021000.

It is not an unprimeable number, because it can be changed into a prime (2101220021051) 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, 59061676 + ... + 59097241.

It is an arithmetic number, because the mean of its divisors is an integer number (525334549428).

Almost surely, 2^{2101220021011} is an apocalyptic number.

2101220021011 is a deficient number, since it is larger than the sum of its proper divisors (118176701).

2101220021011 is a wasteful number, since it uses less digits than its factorization.

2101220021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118176700.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101220021011 its reverse (1101200221012), we get a palindrome (3202420242023).

The spelling of 2101220021011 in words is "two trillion, one hundred one billion, two hundred twenty million, twenty-one thousand, eleven".