21320301212129 has 2 divisors, whose sum is σ = 21320301212130. Its totient is φ = 21320301212128.

The previous prime is 21320301212083. The next prime is 21320301212141. The reversal of 21320301212129 is 92121210302312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16224663160225 + 5095638051904 = 4027985^2 + 2257352^2 .

It is a cyclic number.

It is not a de Polignac number, because 21320301212129 - 2³² = 21316006244833 is a prime.

It is not a weakly prime, because it can be changed into another prime (21320301212929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660150606064 + 10660150606065.

It is an arithmetic number, because the mean of its divisors is an integer number (10660150606065).

Almost surely, 2^{21320301212129} is an apocalyptic number.

It is an amenable number.

21320301212129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320301212129 is an equidigital number, since it uses as much as digits as its factorization.

21320301212129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 21320301212129 in words is "twenty-one trillion, three hundred twenty billion, three hundred one million, two hundred twelve thousand, one hundred twenty-nine".