213061211 has 4 divisors (see below), whose sum is σ = 232430424. Its totient is φ = 193692000.

The previous prime is 213061201. The next prime is 213061223. The reversal of 213061211 is 112160312.

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

It is a cyclic number.

It is not a de Polignac number, because 213061211 - 2¹⁴ = 213044827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213061211.

It is not an unprimeable number, because it can be changed into a prime (213061201) 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, 9684590 + ... + 9684611.

It is an arithmetic number, because the mean of its divisors is an integer number (58107606).

Almost surely, 2^213061211 is an apocalyptic number.

213061211 is a deficient number, since it is larger than the sum of its proper divisors (19369213).

213061211 is a wasteful number, since it uses less digits than its factorization.

213061211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19369212.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 213061211 is about 14596.6164229934. The cubic root of 213061211 is about 597.2664642909.

The spelling of 213061211 in words is "two hundred thirteen million, sixty-one thousand, two hundred eleven".