21223100033129 has 2 divisors, whose sum is σ = 21223100033130. Its totient is φ = 21223100033128.

The previous prime is 21223100033111. The next prime is 21223100033159. The reversal of 21223100033129 is 92133000132212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17226459327529 + 3996640705600 = 4150477^2 + 1999160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223100033129 is a prime.

It is not a weakly prime, because it can be changed into another prime (21223100033159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611550016564 + 10611550016565.

It is an arithmetic number, because the mean of its divisors is an integer number (10611550016565).

Almost surely, 2^{21223100033129} is an apocalyptic number.

It is an amenable number.

21223100033129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223100033129 is an equidigital number, since it uses as much as digits as its factorization.

21223100033129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 21223100033129 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, thirty-three thousand, one hundred twenty-nine".