10101540202021 has 2 divisors, whose sum is σ = 10101540202022. Its totient is φ = 10101540202020.

The previous prime is 10101540201931. The next prime is 10101540202031. The reversal of 10101540202021 is 12020204510101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5430694248225 + 4670845953796 = 2330385^2 + 2161214^2 .

It is an emirp because it is prime and its reverse (12020204510101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10101540202021 - 2⁹ = 10101540201509 is a prime.

It is a super-2 number, since 2×10101540202021² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10101540202021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10101540202031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050770101010 + 5050770101011.

It is an arithmetic number, because the mean of its divisors is an integer number (5050770101011).

Almost surely, 2^{10101540202021} is an apocalyptic number.

It is an amenable number.

10101540202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10101540202021 is an equidigital number, since it uses as much as digits as its factorization.

10101540202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 10101540202021 its reverse (12020204510101), we get a palindrome (22121744712122).

The spelling of 10101540202021 in words is "ten trillion, one hundred one billion, five hundred forty million, two hundred two thousand, twenty-one".