1211230152 has 192 divisors, whose sum is σ = 3758788800. Its totient is φ = 358387200.

The previous prime is 1211230123. The next prime is 1211230157. The reversal of 1211230152 is 2510321121.

It is a super-2 number, since 2×1211230152² = 2934156962227886208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1211230157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8841028 + ... + 8841164.

It is an arithmetic number, because the mean of its divisors is an integer number (19577025).

Almost surely, 2^1211230152 is an apocalyptic number.

1211230152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211230152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1879394400).

1211230152 is an abundant number, since it is smaller than the sum of its proper divisors (2547558648).

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

1211230152 is a wasteful number, since it uses less digits than its factorization.

1211230152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1211230152 is about 34802.7319617297. The cubic root of 1211230152 is about 1065.9632309113.

Adding to 1211230152 its reverse (2510321121), we get a palindrome (3721551273).

The spelling of 1211230152 in words is "one billion, two hundred eleven million, two hundred thirty thousand, one hundred fifty-two".