213061212 has 288 divisors, whose sum is σ = 732883200. Its totient is φ = 52907904.

The previous prime is 213061201. The next prime is 213061223. The reversal of 213061212 is 212160312.

213061212 is a `hidden beast` number, since 21 + 30 + 612 + 1 + 2 = 666.

213061212 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213061201) and next prime (213061223).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1307043 + ... + 1307205.

Almost surely, 2^213061212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213061212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366441600).

213061212 is an abundant number, since it is smaller than the sum of its proper divisors (519821988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213061212 is a wasteful number, since it uses less digits than its factorization.

213061212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 213061212 is about 14596.6164572479. The cubic root of 213061212 is about 597.2664652253.

The spelling of 213061212 in words is "two hundred thirteen million, sixty-one thousand, two hundred twelve".