21120120001129 has 2 divisors, whose sum is σ = 21120120001130. Its totient is φ = 21120120001128.

The previous prime is 21120120001111. The next prime is 21120120001243. The reversal of 21120120001129 is 92110002102112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14676254521600 + 6443865479529 = 3830960^2 + 2538477^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120120001129 - 2³³ = 21111530066537 is a prime.

It is a super-2 number, since 2×21120120001129² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120120005129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560060000564 + 10560060000565.

It is an arithmetic number, because the mean of its divisors is an integer number (10560060000565).

Almost surely, 2^{21120120001129} is an apocalyptic number.

It is an amenable number.

21120120001129 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120120001129 is an equidigital number, since it uses as much as digits as its factorization.

21120120001129 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 22.

The spelling of 21120120001129 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, one thousand, one hundred twenty-nine".