213671627835121 has 3 divisors (see below), whose sum is σ = 213671642452633. Its totient is φ = 213671613217610.

The previous prime is 213671627835119. The next prime is 213671627835187. The reversal of 213671627835121 is 121538726176312.

It is a happy number.

The square root of 213671627835121 is 14617511.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 213671627835121 - 2¹ = 213671627835119 is a prime.

It is a super-2 number, since 2×213671627835121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213671627830121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7308756 + ... + 21926266.

Almost surely, 2^{213671627835121} is an apocalyptic number.

213671627835121 is the 14617511-st square number.

213671627835121 is the 7308756-th centered octagonal number.

It is an amenable number.

213671627835121 is a deficient number, since it is larger than the sum of its proper divisors (14617512).

213671627835121 is an frugal number, since it uses more digits than its factorization.

213671627835121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29235022 (or 14617511 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The spelling of 213671627835121 in words is "two hundred thirteen trillion, six hundred seventy-one billion, six hundred twenty-seven million, eight hundred thirty-five thousand, one hundred twenty-one".