1211208150 has 48 divisors (see below), whose sum is σ = 3007338768. Its totient is φ = 322608000.

The previous prime is 1211208149. The next prime is 1211208191. The reversal of 1211208150 is 518021121.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136860 + ... + 145440.

It is an arithmetic number, because the mean of its divisors is an integer number (62652891).

Almost surely, 2^1211208150 is an apocalyptic number.

1211208150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211208150 is an abundant number, since it is smaller than the sum of its proper divisors (1796130618).

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

1211208150 is a wasteful number, since it uses less digits than its factorization.

1211208150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537 (or 9532 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 21.

The square root of 1211208150 is about 34802.4158644195. The cubic root of 1211208150 is about 1065.9567764636.

Adding to 1211208150 its reverse (518021121), we get a palindrome (1729229271).

The spelling of 1211208150 in words is "one billion, two hundred eleven million, two hundred eight thousand, one hundred fifty".