1110002021221 has 2 divisors, whose sum is σ = 1110002021222. Its totient is φ = 1110002021220.

The previous prime is 1110002021201. The next prime is 1110002021257. The reversal of 1110002021221 is 1221202000111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1027739750625 + 82262270596 = 1013775^2 + 286814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1110002021221 - 2²¹ = 1109999924069 is a prime.

It is a super-2 number, since 2×1110002021221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1110002021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555001010610 + 555001010611.

It is an arithmetic number, because the mean of its divisors is an integer number (555001010611).

Almost surely, 2^{1110002021221} is an apocalyptic number.

It is an amenable number.

1110002021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1110002021221 is an equidigital number, since it uses as much as digits as its factorization.

1110002021221 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 1110002021221 its reverse (1221202000111), we get a palindrome (2331204021332).

The spelling of 1110002021221 in words is "one trillion, one hundred ten billion, two million, twenty-one thousand, two hundred twenty-one".