1011120211021 has 2 divisors, whose sum is σ = 1011120211022. Its totient is φ = 1011120211020.

The previous prime is 1011120211019. The next prime is 1011120211063. The reversal of 1011120211021 is 1201120211101.

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., 1010125502500 + 994708521 = 1005050^2 + 31539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011120211021 - 2¹ = 1011120211019 is a prime.

It is a super-2 number, since 2×1011120211021² (a number of 25 digits) contains 22 as substring.

Together with 1011120211019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1011120210992 and 1011120211010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011120211121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505560105510 + 505560105511.

It is an arithmetic number, because the mean of its divisors is an integer number (505560105511).

Almost surely, 2^{1011120211021} is an apocalyptic number.

It is an amenable number.

1011120211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011120211021 is an equidigital number, since it uses as much as digits as its factorization.

1011120211021 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 1011120211021 its reverse (1201120211101), we get a palindrome (2212240422122).

The spelling of 1011120211021 in words is "one trillion, eleven billion, one hundred twenty million, two hundred eleven thousand, twenty-one".