101020202110921 has 2 divisors, whose sum is σ = 101020202110922. Its totient is φ = 101020202110920.

The previous prime is 101020202110753. The next prime is 101020202111029. The reversal of 101020202110921 is 129011202020101.

Together with next prime (101020202111029) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53984801079225 + 47035401031696 = 7347435^2 + 6858236^2 .

It is an emirp because it is prime and its reverse (129011202020101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101020202110921 - 2²⁷ = 101020067893193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101020202110892 and 101020202110901.

It is not a weakly prime, because it can be changed into another prime (101020202116921) 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, 50510101055460 + 50510101055461.

It is an arithmetic number, because the mean of its divisors is an integer number (50510101055461).

Almost surely, 2^{101020202110921} is an apocalyptic number.

It is an amenable number.

101020202110921 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020202110921 is an equidigital number, since it uses as much as digits as its factorization.

101020202110921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 101020202110921 in words is "one hundred one trillion, twenty billion, two hundred two million, one hundred ten thousand, nine hundred twenty-one".