1121201002021 has 2 divisors, whose sum is σ = 1121201002022. Its totient is φ = 1121201002020.

The previous prime is 1121201001997. The next prime is 1121201002027. The reversal of 1121201002021 is 1202001021211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1110464933796 + 10736068225 = 1053786^2 + 103615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121201002021 - 2⁹ = 1121201001509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121201001992 and 1121201002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121201002027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560600501010 + 560600501011.

It is an arithmetic number, because the mean of its divisors is an integer number (560600501011).

Almost surely, 2^{1121201002021} is an apocalyptic number.

It is an amenable number.

1121201002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121201002021 is an equidigital number, since it uses as much as digits as its factorization.

1121201002021 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 1121201002021 its reverse (1202001021211), we get a palindrome (2323202023232).

The spelling of 1121201002021 in words is "one trillion, one hundred twenty-one billion, two hundred one million, two thousand, twenty-one".