201121211029 has 2 divisors, whose sum is σ = 201121211030. Its totient is φ = 201121211028.

The previous prime is 201121211009. The next prime is 201121211087. The reversal of 201121211029 is 920112121102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165647372004 + 35473839025 = 406998^2 + 188345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201121211029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201121211009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100560605514 + 100560605515.

It is an arithmetic number, because the mean of its divisors is an integer number (100560605515).

Almost surely, 2^201121211029 is an apocalyptic number.

It is an amenable number.

201121211029 is a deficient number, since it is larger than the sum of its proper divisors (1).

201121211029 is an equidigital number, since it uses as much as digits as its factorization.

201121211029 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 201121211029 in words is "two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty-nine".