1211140533 has 16 divisors (see below), whose sum is σ = 1655740800. Its totient is φ = 787019520.

The previous prime is 1211140523. The next prime is 1211140589. The reversal of 1211140533 is 3350411121.

It is not a de Polignac number, because 1211140533 - 2⁴ = 1211140517 is a prime.

It is a super-2 number, since 2×1211140533² = 2933722781351048178, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211140523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154728 + ... + 162366.

It is an arithmetic number, because the mean of its divisors is an integer number (103483800).

Almost surely, 2^1211140533 is an apocalyptic number.

It is an amenable number.

1211140533 is a deficient number, since it is larger than the sum of its proper divisors (444600267).

1211140533 is a wasteful number, since it uses less digits than its factorization.

1211140533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1211140533 is about 34801.4444096793. Note that the first 4 decimals coincide. The cubic root of 1211140533 is about 1065.9369400326.

Adding to 1211140533 its reverse (3350411121), we get a palindrome (4561551654).

The spelling of 1211140533 in words is "one billion, two hundred eleven million, one hundred forty thousand, five hundred thirty-three".