1211208152 has 128 divisors (see below), whose sum is σ = 3012111360. Its totient is φ = 442590720.

The previous prime is 1211208149. The next prime is 1211208191. The reversal of 1211208152 is 2518021121.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 750098 + ... + 751710.

It is an arithmetic number, because the mean of its divisors is an integer number (23532120).

Almost surely, 2^1211208152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211208152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506055680).

1211208152 is an abundant number, since it is smaller than the sum of its proper divisors (1800903208).

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

1211208152 is a wasteful number, since it uses less digits than its factorization.

1211208152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1713 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1211208152 is about 34802.4158931532. The cubic root of 1211208152 is about 1065.9567770504.

Adding to 1211208152 its reverse (2518021121), we get a palindrome (3729229273).

The spelling of 1211208152 in words is "one billion, two hundred eleven million, two hundred eight thousand, one hundred fifty-two".