1211332040 has 16 divisors (see below), whose sum is σ = 2725497180. Its totient is φ = 484532800.

The previous prime is 1211332039. The next prime is 1211332051. The reversal of 1211332040 is 402331121.

It can be written as a sum of positive squares in 2 ways, for example, as 1049889604 + 161442436 = 32402^2 + 12706^2 .

It is a super-2 number, since 2×1211332040² = 2934650622261123200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15141611 + ... + 15141690.

Almost surely, 2^1211332040 is an apocalyptic number.

1211332040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211332040 is an abundant number, since it is smaller than the sum of its proper divisors (1514165140).

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

1211332040 is a wasteful number, since it uses less digits than its factorization.

1211332040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30283312 (or 30283308 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1211332040 is about 34804.1957240790. The cubic root of 1211332040 is about 1065.9931194827.

Adding to 1211332040 its reverse (402331121), we get a palindrome (1613663161).

The spelling of 1211332040 in words is "one billion, two hundred eleven million, three hundred thirty-two thousand, forty".