1121012110021 has 4 divisors (see below), whose sum is σ = 1148353868844. Its totient is φ = 1093670351200.

The previous prime is 1121012110013. The next prime is 1121012110033. The reversal of 1121012110021 is 1200112101211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95833584900 + 1025178525121 = 309570^2 + 1012511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121012110021 - 2³ = 1121012110013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121012109983 and 1121012110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121012110051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13670879350 + ... + 13670879431.

It is an arithmetic number, because the mean of its divisors is an integer number (287088467211).

Almost surely, 2^{1121012110021} is an apocalyptic number.

It is an amenable number.

1121012110021 is a deficient number, since it is larger than the sum of its proper divisors (27341758823).

1121012110021 is an equidigital number, since it uses as much as digits as its factorization.

1121012110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27341758822.

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

Adding to 1121012110021 its reverse (1200112101211), we get a palindrome (2321124211232).

The spelling of 1121012110021 in words is "one trillion, one hundred twenty-one billion, twelve million, one hundred ten thousand, twenty-one".