210220001221129 has 2 divisors, whose sum is σ = 210220001221130. Its totient is φ = 210220001221128.

The previous prime is 210220001221049. The next prime is 210220001221151. The reversal of 210220001221129 is 921122100022012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208502192556025 + 1717808665104 = 14439605^2 + 1310652^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220001221129 - 2¹³ = 210220001212937 is a prime.

It is a super-2 number, since 2×210220001221129² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (210220001221429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110000610564 + 105110000610565.

It is an arithmetic number, because the mean of its divisors is an integer number (105110000610565).

Almost surely, 2^{210220001221129} is an apocalyptic number.

It is an amenable number.

210220001221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220001221129 is an equidigital number, since it uses as much as digits as its factorization.

210220001221129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 210220001221129 in words is "two hundred ten trillion, two hundred twenty billion, one million, two hundred twenty-one thousand, one hundred twenty-nine".