1101010201021 has 2 divisors, whose sum is σ = 1101010201022. Its totient is φ = 1101010201020.

The previous prime is 1101010201019. The next prime is 1101010201051. The reversal of 1101010201021 is 1201020101011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561321617796 + 539688583225 = 749214^2 + 734635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101010201021 - 2¹ = 1101010201019 is a prime.

Together with 1101010201019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1101010200989 and 1101010201007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101010201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550505100510 + 550505100511.

It is an arithmetic number, because the mean of its divisors is an integer number (550505100511).

Almost surely, 2^{1101010201021} is an apocalyptic number.

It is an amenable number.

1101010201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101010201021 is an equidigital number, since it uses as much as digits as its factorization.

1101010201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1101010201021 its reverse (1201020101011), we get a palindrome (2302030302032).

It can be divided in two parts, 1101010 and 201021, that added together give a palindrome (1302031).

The spelling of 1101010201021 in words is "one trillion, one hundred one billion, ten million, two hundred one thousand, twenty-one".