10921312011989 has 2 divisors, whose sum is σ = 10921312011990. Its totient is φ = 10921312011988.

The previous prime is 10921312011931. The next prime is 10921312012021. The reversal of 10921312011989 is 98911021312901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9779442384100 + 1141869627889 = 3127210^2 + 1068583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10921312011989 is a prime.

It is a super-2 number, since 2×10921312011989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10921312011919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5460656005994 + 5460656005995.

It is an arithmetic number, because the mean of its divisors is an integer number (5460656005995).

Almost surely, 2^{10921312011989} is an apocalyptic number.

It is an amenable number.

10921312011989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10921312011989 is an equidigital number, since it uses as much as digits as its factorization.

10921312011989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 47.

The spelling of 10921312011989 in words is "ten trillion, nine hundred twenty-one billion, three hundred twelve million, eleven thousand, nine hundred eighty-nine".