211123025513 has 4 divisors (see below), whose sum is σ = 211194426180. Its totient is φ = 211051624848.

The previous prime is 211123025501. The next prime is 211123025527. The reversal of 211123025513 is 315520321112.

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 33416936809 + 177706088704 = 182803^2 + 421552^2 .

It is a cyclic number.

It is not a de Polignac number, because 211123025513 - 2²⁶ = 211055916649 is a prime.

It is a super-4 number, since 4×211123025513⁴ (a number of 46 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211123025713) 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, 35695898 + ... + 35701811.

It is an arithmetic number, because the mean of its divisors is an integer number (52798606545).

Almost surely, 2^211123025513 is an apocalyptic number.

It is an amenable number.

211123025513 is a deficient number, since it is larger than the sum of its proper divisors (71400667).

211123025513 is an equidigital number, since it uses as much as digits as its factorization.

211123025513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71400666.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 211123025513 its reverse (315520321112), we get a palindrome (526643346625).

The spelling of 211123025513 in words is "two hundred eleven billion, one hundred twenty-three million, twenty-five thousand, five hundred thirteen".