21142999980229 has 2 divisors, whose sum is σ = 21142999980230. Its totient is φ = 21142999980228.

The previous prime is 21142999980203. The next prime is 21142999980239. The reversal of 21142999980229 is 92208999924112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12443609002500 + 8699390977729 = 3527550^2 + 2949473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21142999980229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142999980239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571499990114 + 10571499990115.

It is an arithmetic number, because the mean of its divisors is an integer number (10571499990115).

Almost surely, 2^{21142999980229} is an apocalyptic number.

It is an amenable number.

21142999980229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142999980229 is an equidigital number, since it uses as much as digits as its factorization.

21142999980229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30233088, while the sum is 67.

The spelling of 21142999980229 in words is "twenty-one trillion, one hundred forty-two billion, nine hundred ninety-nine million, nine hundred eighty thousand, two hundred twenty-nine".