1211021444 has 12 divisors (see below), whose sum is σ = 2120197968. Its totient is φ = 605250600.

The previous prime is 1211021437. The next prime is 1211021459. The reversal of 1211021444 is 4441201121.

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, 54362 + ... + 73329.

It is an arithmetic number, because the mean of its divisors is an integer number (176683164).

Almost surely, 2^1211021444 is an apocalyptic number.

It is an amenable number.

1211021444 is a deficient number, since it is larger than the sum of its proper divisors (909176524).

1211021444 is a wasteful number, since it uses less digits than its factorization.

1211021444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130066 (or 130064 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1211021444 is about 34799.7333897833. The cubic root of 1211021444 is about 1065.9020017461.

Adding to 1211021444 its reverse (4441201121), we get a palindrome (5652222565).

The spelling of 1211021444 in words is "one billion, two hundred eleven million, twenty-one thousand, four hundred forty-four".