10721011781099 has 2 divisors, whose sum is σ = 10721011781100. Its totient is φ = 10721011781098.

The previous prime is 10721011781089. The next prime is 10721011781113. The reversal of 10721011781099 is 99018711012701.

It is a weak prime.

It is an emirp because it is prime and its reverse (99018711012701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10721011781099 - 2⁴ = 10721011781083 is a prime.

It is a super-2 number, since 2×10721011781099² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (10721011781089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360505890549 + 5360505890550.

It is an arithmetic number, because the mean of its divisors is an integer number (5360505890550).

Almost surely, 2^{10721011781099} is an apocalyptic number.

10721011781099 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721011781099 is an equidigital number, since it uses as much as digits as its factorization.

10721011781099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 47.

The spelling of 10721011781099 in words is "ten trillion, seven hundred twenty-one billion, eleven million, seven hundred eighty-one thousand, ninety-nine".