1021220201101 has 2 divisors, whose sum is σ = 1021220201102. Its totient is φ = 1021220201100.

The previous prime is 1021220201087. The next prime is 1021220201117. The reversal of 1021220201101 is 1011020221201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 566271300100 + 454948901001 = 752510^2 + 674499^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021220201101 - 2⁵ = 1021220201069 is a prime.

It is a super-2 number, since 2×1021220201101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021220201161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610100550 + 510610100551.

It is an arithmetic number, because the mean of its divisors is an integer number (510610100551).

Almost surely, 2^{1021220201101} is an apocalyptic number.

It is an amenable number.

1021220201101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021220201101 is an equidigital number, since it uses as much as digits as its factorization.

1021220201101 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 1021220201101 its reverse (1011020221201), we get a palindrome (2032240422302).

The spelling of 1021220201101 in words is "one trillion, twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred one".