905121212 has 6 divisors (see below), whose sum is σ = 1583962128. Its totient is φ = 452560604.

The previous prime is 905121199. The next prime is 905121223. The reversal of 905121212 is 212121509.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113140148 + ... + 113140155.

It is an arithmetic number, because the mean of its divisors is an integer number (263993688).

Almost surely, 2^905121212 is an apocalyptic number.

It is an amenable number.

905121212 is a deficient number, since it is larger than the sum of its proper divisors (678840916).

905121212 is a wasteful number, since it uses less digits than its factorization.

905121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226280307 (or 226280305 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 905121212 is about 30085.2324571375. The cubic root of 905121212 is about 967.3172094008.

The spelling of 905121212 in words is "nine hundred five million, one hundred twenty-one thousand, two hundred twelve".