11222212010021 has 2 divisors, whose sum is σ = 11222212010022. Its totient is φ = 11222212010020.

The previous prime is 11222212010017. The next prime is 11222212010047. The reversal of 11222212010021 is 12001021222211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8047717922500 + 3174494087521 = 2836850^2 + 1781711^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222212010021 - 2² = 11222212010017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222212010071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611106005010 + 5611106005011.

It is an arithmetic number, because the mean of its divisors is an integer number (5611106005011).

Almost surely, 2^{11222212010021} is an apocalyptic number.

It is an amenable number.

11222212010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222212010021 is an equidigital number, since it uses as much as digits as its factorization.

11222212010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11222212010021 its reverse (12001021222211), we get a palindrome (23223233232232).

The spelling of 11222212010021 in words is "eleven trillion, two hundred twenty-two billion, two hundred twelve million, ten thousand, twenty-one".