10721755671049 has 2 divisors, whose sum is σ = 10721755671050. Its totient is φ = 10721755671048.

The previous prime is 10721755671023. The next prime is 10721755671167. The reversal of 10721755671049 is 94017655712701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6895455846400 + 3826299824649 = 2625920^2 + 1956093^2 .

It is a cyclic number.

It is not a de Polignac number, because 10721755671049 - 2¹⁹ = 10721755146761 is a prime.

It is a super-2 number, since 2×10721755671049² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10721755671019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360877835524 + 5360877835525.

It is an arithmetic number, because the mean of its divisors is an integer number (5360877835525).

Almost surely, 2^{10721755671049} is an apocalyptic number.

It is an amenable number.

10721755671049 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721755671049 is an equidigital number, since it uses as much as digits as its factorization.

10721755671049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 55.

The spelling of 10721755671049 in words is "ten trillion, seven hundred twenty-one billion, seven hundred fifty-five million, six hundred seventy-one thousand, forty-nine".