1101211021021 has 2 divisors, whose sum is σ = 1101211021022. Its totient is φ = 1101211021020.

The previous prime is 1101211021007. The next prime is 1101211021037. The reversal of 1101211021021 is 1201201121011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842421087225 + 258789933796 = 917835^2 + 508714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101211021021 - 2⁷ = 1101211020893 is a prime.

It is a super-2 number, since 2×1101211021021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1101211020992 and 1101211021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101214021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550605510510 + 550605510511.

It is an arithmetic number, because the mean of its divisors is an integer number (550605510511).

Almost surely, 2^{1101211021021} is an apocalyptic number.

It is an amenable number.

1101211021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101211021021 is an equidigital number, since it uses as much as digits as its factorization.

1101211021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1101211021021 its reverse (1201201121011), we get a palindrome (2302412142032).

The spelling of 1101211021021 in words is "one trillion, one hundred one billion, two hundred eleven million, twenty-one thousand, twenty-one".