201191212 has 48 divisors (see below), whose sum is σ = 385640640. Its totient is φ = 91542528.

The previous prime is 201191203. The next prime is 201191257. The reversal of 201191212 is 212191102.

201191212 = 1624² + 1625² + ... + 1696².

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201191212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194248 + ... + 195280.

It is an arithmetic number, because the mean of its divisors is an integer number (8034180).

Almost surely, 2^201191212 is an apocalyptic number.

It is an amenable number.

201191212 is a deficient number, since it is larger than the sum of its proper divisors (184449428).

201191212 is a wasteful number, since it uses less digits than its factorization.

201191212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 201191212 is about 14184.1888030299. The cubic root of 201191212 is about 585.9622918344.

The spelling of 201191212 in words is "two hundred one million, one hundred ninety-one thousand, two hundred twelve".