20210101229 has 2 divisors, whose sum is σ = 20210101230. Its totient is φ = 20210101228.

The previous prime is 20210101217. The next prime is 20210101237. The reversal of 20210101229 is 92210101202.

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., 18094285225 + 2115816004 = 134515^2 + 45998^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210101229 - 2¹² = 20210097133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210101229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210103229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105050614 + 10105050615.

It is an arithmetic number, because the mean of its divisors is an integer number (10105050615).

Almost surely, 2^20210101229 is an apocalyptic number.

It is an amenable number.

20210101229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210101229 is an equidigital number, since it uses as much as digits as its factorization.

20210101229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20210101229 in words is "twenty billion, two hundred ten million, one hundred one thousand, two hundred twenty-nine".