20121111200969 has 2 divisors, whose sum is σ = 20121111200970. Its totient is φ = 20121111200968.

The previous prime is 20121111200947. The next prime is 20121111201017. The reversal of 20121111200969 is 96900211112102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12621592025344 + 7499519175625 = 3552688^2 + 2738525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121111200969 - 2⁸ = 20121111200713 is a prime.

It is a super-2 number, since 2×20121111200969² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20121111280969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060555600484 + 10060555600485.

It is an arithmetic number, because the mean of its divisors is an integer number (10060555600485).

Almost surely, 2^{20121111200969} is an apocalyptic number.

It is an amenable number.

20121111200969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121111200969 is an equidigital number, since it uses as much as digits as its factorization.

20121111200969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The spelling of 20121111200969 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, two hundred thousand, nine hundred sixty-nine".