1211134172 has 24 divisors (see below), whose sum is σ = 2178571920. Its totient is φ = 588712320.

The previous prime is 1211134159. The next prime is 1211134193. The reversal of 1211134172 is 2714311121.

It is a super-2 number, since 2×1211134172² = 2933691965172251168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229904 + ... + 235112.

It is an arithmetic number, because the mean of its divisors is an integer number (90773830).

Almost surely, 2^1211134172 is an apocalyptic number.

It is an amenable number.

1211134172 is a deficient number, since it is larger than the sum of its proper divisors (967437748).

1211134172 is a wasteful number, since it uses less digits than its factorization.

1211134172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821 (or 6819 counting only the distinct ones).

The product of its digits is 336, while the sum is 23.

The square root of 1211134172 is about 34801.3530196744. The cubic root of 1211134172 is about 1065.9350739027.

Adding to 1211134172 its reverse (2714311121), we get a palindrome (3925445293).

The spelling of 1211134172 in words is "one billion, two hundred eleven million, one hundred thirty-four thousand, one hundred seventy-two".