213011012218 has 4 divisors (see below), whose sum is σ = 319516518330. Its totient is φ = 106505506108.

The previous prime is 213011012209. The next prime is 213011012237. The reversal of 213011012218 is 812210110312.

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

It can be written as a sum of positive squares in only one way, i.e., 200746114209 + 12264898009 = 448047^2 + 110747^2 .

It is a super-2 number, since 2×213011012218² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53252753053 + ... + 53252753056.

Almost surely, 2^213011012218 is an apocalyptic number.

213011012218 is a deficient number, since it is larger than the sum of its proper divisors (106505506112).

213011012218 is a wasteful number, since it uses less digits than its factorization.

213011012218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106505506111.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 213011012218 in words is "two hundred thirteen billion, eleven million, twelve thousand, two hundred eighteen".