1011220012021 has 2 divisors, whose sum is σ = 1011220012022. Its totient is φ = 1011220012020.

The previous prime is 1011220012013. The next prime is 1011220012097. The reversal of 1011220012021 is 1202100221101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007423727025 + 3796284996 = 1003705^2 + 61614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011220012021 - 2³ = 1011220012013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1011220011992 and 1011220012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011220912021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505610006010 + 505610006011.

It is an arithmetic number, because the mean of its divisors is an integer number (505610006011).

Almost surely, 2^{1011220012021} is an apocalyptic number.

It is an amenable number.

1011220012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011220012021 is an equidigital number, since it uses as much as digits as its factorization.

1011220012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1011220012021 its reverse (1202100221101), we get a palindrome (2213320233122).

The spelling of 1011220012021 in words is "one trillion, eleven billion, two hundred twenty million, twelve thousand, twenty-one".