213401211125 has 8 divisors (see below), whose sum is σ = 266324711640. Its totient is φ = 170720968800.

The previous prime is 213401211083. The next prime is 213401211161. The reversal of 213401211125 is 521112104312.

It can be written as a sum of positive squares in 4 ways, for example, as 387577969 + 213013633156 = 19687^2 + 461534^2 .

It is not a de Polignac number, because 213401211125 - 2¹² = 213401207029 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213401211125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853604720 + ... + 853604969.

It is an arithmetic number, because the mean of its divisors is an integer number (33290588955).

Almost surely, 2^213401211125 is an apocalyptic number.

213401211125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213401211125 is a deficient number, since it is larger than the sum of its proper divisors (52923500515).

213401211125 is an equidigital number, since it uses as much as digits as its factorization.

213401211125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707209704 (or 1707209694 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 213401211125 its reverse (521112104312), we get a palindrome (734513315437).

The spelling of 213401211125 in words is "two hundred thirteen billion, four hundred one million, two hundred eleven thousand, one hundred twenty-five".