1211020032 has 36 divisors (see below), whose sum is σ = 3223081400. Its totient is φ = 403673088.

The previous prime is 1211020021. The next prime is 1211020037. The reversal of 1211020032 is 2300201121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1211020037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787657 + ... + 789192.

Almost surely, 2^1211020032 is an apocalyptic number.

1211020032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211020032 is an abundant number, since it is smaller than the sum of its proper divisors (2012061368).

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

1211020032 is an equidigital number, since it uses as much as digits as its factorization.

1211020032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576868 (or 1576854 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1211020032 is about 34799.7131022657. The cubic root of 1211020032 is about 1065.9015874803.

Adding to 1211020032 its reverse (2300201121), we get a palindrome (3511221153).

The spelling of 1211020032 in words is "one billion, two hundred eleven million, twenty thousand, thirty-two".