10721011781113 has 2 divisors, whose sum is σ = 10721011781114. Its totient is φ = 10721011781112.

The previous prime is 10721011781099. The next prime is 10721011781119. The reversal of 10721011781113 is 31118711012701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10384203337209 + 336808443904 = 3222453^2 + 580352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10721011781113 is a prime.

It is a super-2 number, since 2×10721011781113² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10721011781119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360505890556 + 5360505890557.

It is an arithmetic number, because the mean of its divisors is an integer number (5360505890557).

Almost surely, 2^{10721011781113} is an apocalyptic number.

It is an amenable number.

10721011781113 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721011781113 is an equidigital number, since it uses as much as digits as its factorization.

10721011781113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 34.

Adding to 10721011781113 its reverse (31118711012701), we get a palindrome (41839722793814).

The spelling of 10721011781113 in words is "ten trillion, seven hundred twenty-one billion, eleven million, seven hundred eighty-one thousand, one hundred thirteen".