1211152012 has 36 divisors (see below), whose sum is σ = 2610599544. Its totient is φ = 488530560.

The previous prime is 1211151983. The next prime is 1211152021. The reversal of 1211152012 is 2102511121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178414 + ... + 185077.

It is an arithmetic number, because the mean of its divisors is an integer number (72516654).

Almost surely, 2^1211152012 is an apocalyptic number.

It is an amenable number.

1211152012 is an abundant number, since it is smaller than the sum of its proper divisors (1399447532).

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

1211152012 is a wasteful number, since it uses less digits than its factorization.

1211152012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363526 (or 363517 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1211152012 is about 34801.6093306042. The cubic root of 1211152012 is about 1065.9403076164.

Adding to 1211152012 its reverse (2102511121), we get a palindrome (3313663133).

The spelling of 1211152012 in words is "one billion, two hundred eleven million, one hundred fifty-two thousand, twelve".