1000021021229 has 2 divisors, whose sum is σ = 1000021021230. Its totient is φ = 1000021021228.

The previous prime is 1000021021199. The next prime is 1000021021243. The reversal of 1000021021229 is 9221201200001.

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., 801615808900 + 198405212329 = 895330^2 + 445427^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000021021229 - 2¹⁶ = 1000020955693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1000021021229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000021021249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010510614 + 500010510615.

It is an arithmetic number, because the mean of its divisors is an integer number (500010510615).

Almost surely, 2^{1000021021229} is an apocalyptic number.

It is an amenable number.

1000021021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000021021229 is an equidigital number, since it uses as much as digits as its factorization.

1000021021229 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 20.

The spelling of 1000021021229 in words is "one trillion, twenty-one million, twenty-one thousand, two hundred twenty-nine".