21069206062711 has 4 divisors (see below), whose sum is σ = 21069234008424. Its totient is φ = 21069178117000.

The previous prime is 21069206062699. The next prime is 21069206062727. The reversal of 21069206062711 is 11726060296012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21069206062711 is a prime.

It is a super-2 number, since 2×21069206062711² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21069206062771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12809680 + ... + 14360581.

It is an arithmetic number, because the mean of its divisors is an integer number (5267308502106).

Almost surely, 2^{21069206062711} is an apocalyptic number.

21069206062711 is a deficient number, since it is larger than the sum of its proper divisors (27945713).

21069206062711 is an equidigital number, since it uses as much as digits as its factorization.

21069206062711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27945712.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 21069206062711 in words is "twenty-one trillion, sixty-nine billion, two hundred six million, sixty-two thousand, seven hundred eleven".