1210221036 has 36 divisors (see below), whose sum is σ = 3220180600. Its totient is φ = 382174848.

The previous prime is 1210221013. The next prime is 1210221037. The reversal of 1210221036 is 6301220121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1210221037) 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 11 ways as a sum of consecutive naturals, for example, 883981 + ... + 885348.

Almost surely, 2^1210221036 is an apocalyptic number.

It is an amenable number.

1210221036 is an abundant number, since it is smaller than the sum of its proper divisors (2009959564).

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

1210221036 is a wasteful number, since it uses less digits than its factorization.

1210221036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769358 (or 1769353 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1210221036 is about 34788.2312858817. The cubic root of 1210221036 is about 1065.6671188920.

Adding to 1210221036 its reverse (6301220121), we get a palindrome (7511441157).

The spelling of 1210221036 in words is "one billion, two hundred ten million, two hundred twenty-one thousand, thirty-six".