901212212 has 24 divisors (see below), whose sum is σ = 1611037512. Its totient is φ = 440960000.

The previous prime is 901212209. The next prime is 901212217. The reversal of 901212212 is 212212109.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 675792016 + 225420196 = 25996^2 + 15014^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901212217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79712 + ... + 90312.

It is an arithmetic number, because the mean of its divisors is an integer number (67126563).

Almost surely, 2^901212212 is an apocalyptic number.

It is an amenable number.

901212212 is a deficient number, since it is larger than the sum of its proper divisors (709825300).

901212212 is a wasteful number, since it uses less digits than its factorization.

901212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059 (or 11057 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 901212212 is about 30020.1967348650. The cubic root of 901212212 is about 965.9226634016.

The spelling of 901212212 in words is "nine hundred one million, two hundred twelve thousand, two hundred twelve".