20111201002129 has 2 divisors, whose sum is σ = 20111201002130. Its totient is φ = 20111201002128.

The previous prime is 20111201002099. The next prime is 20111201002201. The reversal of 20111201002129 is 92120010211102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13284858625600 + 6826342376529 = 3644840^2 + 2612727^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111201002129 - 2¹⁵ = 20111200969361 is a prime.

It is not a weakly prime, because it can be changed into another prime (20111201002229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055600501064 + 10055600501065.

It is an arithmetic number, because the mean of its divisors is an integer number (10055600501065).

Almost surely, 2^{20111201002129} is an apocalyptic number.

It is an amenable number.

20111201002129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111201002129 is an equidigital number, since it uses as much as digits as its factorization.

20111201002129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 20111201002129 in words is "twenty trillion, one hundred eleven billion, two hundred one million, two thousand, one hundred twenty-nine".