101042210981 has 2 divisors, whose sum is σ = 101042210982. Its totient is φ = 101042210980.

The previous prime is 101042210953. The next prime is 101042210987. The reversal of 101042210981 is 189012240101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56295154756 + 44747056225 = 237266^2 + 211535^2 .

It is an emirp because it is prime and its reverse (189012240101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101042210981 - 2³⁰ = 99968469157 is a prime.

It is a super-2 number, since 2×101042210981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101042210987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50521105490 + 50521105491.

It is an arithmetic number, because the mean of its divisors is an integer number (50521105491).

Almost surely, 2^101042210981 is an apocalyptic number.

It is an amenable number.

101042210981 is a deficient number, since it is larger than the sum of its proper divisors (1).

101042210981 is an equidigital number, since it uses as much as digits as its factorization.

101042210981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 101042210981 in words is "one hundred one billion, forty-two million, two hundred ten thousand, nine hundred eighty-one".