21035155331123 has 2 divisors, whose sum is σ = 21035155331124. Its totient is φ = 21035155331122.

The previous prime is 21035155331119. The next prime is 21035155331213. The reversal of 21035155331123 is 32113355153012.

Together with next prime (21035155331213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21035155331123 - 2² = 21035155331119 is a prime.

It is a super-2 number, since 2×21035155331123² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21035155339123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10517577665561 + 10517577665562.

It is an arithmetic number, because the mean of its divisors is an integer number (10517577665562).

Almost surely, 2^{21035155331123} is an apocalyptic number.

21035155331123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21035155331123 is an equidigital number, since it uses as much as digits as its factorization.

21035155331123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 21035155331123 in words is "twenty-one trillion, thirty-five billion, one hundred fifty-five million, three hundred thirty-one thousand, one hundred twenty-three".