151221212 has 12 divisors (see below), whose sum is σ = 265402200. Its totient is φ = 75392016.

The previous prime is 151221197. The next prime is 151221223. The reversal of 151221212 is 212122151.

151221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53087 + ... + 55862.

It is an arithmetic number, because the mean of its divisors is an integer number (22116850).

Almost surely, 2^151221212 is an apocalyptic number.

It is an amenable number.

151221212 is a deficient number, since it is larger than the sum of its proper divisors (114180988).

151221212 is a wasteful number, since it uses less digits than its factorization.

151221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109300 (or 109298 counting only the distinct ones).

The product of its digits is 80, while the sum is 17.

The square root of 151221212 is about 12297.2034219167. The cubic root of 151221212 is about 532.7673128696.

Adding to 151221212 its reverse (212122151), we get a palindrome (363343363).

The spelling of 151221212 in words is "one hundred fifty-one million, two hundred twenty-one thousand, two hundred twelve".