11011222010021 has 2 divisors, whose sum is σ = 11011222010022. Its totient is φ = 11011222010020.

The previous prime is 11011222010011. The next prime is 11011222010143. The reversal of 11011222010021 is 12001022211011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9734805604225 + 1276416405796 = 3120065^2 + 1129786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011222010021 is a prime.

It is a super-2 number, since 2×11011222010021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11011222009978 and 11011222010005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11011222010011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505611005010 + 5505611005011.

It is an arithmetic number, because the mean of its divisors is an integer number (5505611005011).

Almost surely, 2^{11011222010021} is an apocalyptic number.

It is an amenable number.

11011222010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11011222010021 is an equidigital number, since it uses as much as digits as its factorization.

11011222010021 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 14.

Adding to 11011222010021 its reverse (12001022211011), we get a palindrome (23012244221032).

The spelling of 11011222010021 in words is "eleven trillion, eleven billion, two hundred twenty-two million, ten thousand, twenty-one".