10212105125531 has 4 divisors (see below), whose sum is σ = 10273255455792. Its totient is φ = 10150954795272.

The previous prime is 10212105125483. The next prime is 10212105125543. The reversal of 10212105125531 is 13552150121201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212105125531 is a prime.

It is a super-2 number, since 2×10212105125531² (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 = 10212105125494 and 10212105125503.

It is not an unprimeable number, because it can be changed into a prime (10212105125561) 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, 30575164880 + ... + 30575165213.

It is an arithmetic number, because the mean of its divisors is an integer number (2568313863948).

Almost surely, 2^{10212105125531} is an apocalyptic number.

10212105125531 is a deficient number, since it is larger than the sum of its proper divisors (61150330261).

10212105125531 is an equidigital number, since it uses as much as digits as its factorization.

10212105125531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61150330260.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 10212105125531 its reverse (13552150121201), we get a palindrome (23764255246732).

The spelling of 10212105125531 in words is "ten trillion, two hundred twelve billion, one hundred five million, one hundred twenty-five thousand, five hundred thirty-one".