21110133031129 has 4 divisors (see below), whose sum is σ = 21110261107684. Its totient is φ = 21110004954576.

The previous prime is 21110133031121. The next prime is 21110133031181. The reversal of 21110133031129 is 92113033101112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19434343233600 + 1675789797529 = 4408440^2 + 1294523^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110133031129 - 2³ = 21110133031121 is a prime.

It is a super-2 number, since 2×21110133031129² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110133031097 and 21110133031106.

It is not an unprimeable number, because it can be changed into a prime (21110133031121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63790722 + ... + 64120795.

It is an arithmetic number, because the mean of its divisors is an integer number (5277565276921).

Almost surely, 2^{21110133031129} is an apocalyptic number.

It is an amenable number.

21110133031129 is a deficient number, since it is larger than the sum of its proper divisors (128076555).

21110133031129 is a wasteful number, since it uses less digits than its factorization.

21110133031129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128076554.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 21110133031129 in words is "twenty-one trillion, one hundred ten billion, one hundred thirty-three million, thirty-one thousand, one hundred twenty-nine".