2011220110021 has 2 divisors, whose sum is σ = 2011220110022. Its totient is φ = 2011220110020.

The previous prime is 2011220109991. The next prime is 2011220110033. The reversal of 2011220110021 is 1200110221102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1267898520100 + 743321589921 = 1126010^2 + 862161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011220110021 - 2²⁷ = 2011085892293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011220109983 and 2011220110010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011220110061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005610055010 + 1005610055011.

It is an arithmetic number, because the mean of its divisors is an integer number (1005610055011).

Almost surely, 2^{2011220110021} is an apocalyptic number.

It is an amenable number.

2011220110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011220110021 is an equidigital number, since it uses as much as digits as its factorization.

2011220110021 is an evil number, because the sum of its binary digits is even.

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

Adding to 2011220110021 its reverse (1200110221102), we get a palindrome (3211330331123).

The spelling of 2011220110021 in words is "two trillion, eleven billion, two hundred twenty million, one hundred ten thousand, twenty-one".