1211020424 has 16 divisors (see below), whose sum is σ = 2318976000. Its totient is φ = 592626832.

The previous prime is 1211020351. The next prime is 1211020427. The reversal of 1211020424 is 4240201121.

It is not an unprimeable number, because it can be changed into a prime (1211020427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610024 + ... + 1610775.

It is an arithmetic number, because the mean of its divisors is an integer number (144936000).

Almost surely, 2^1211020424 is an apocalyptic number.

It is an amenable number.

1211020424 is a deficient number, since it is larger than the sum of its proper divisors (1107955576).

1211020424 is a wasteful number, since it uses less digits than its factorization.

1211020424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220852 (or 3220848 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1211020424 is about 34799.7187344955. The cubic root of 1211020424 is about 1065.9017024889.

Adding to 1211020424 its reverse (4240201121), we get a palindrome (5451221545).

The spelling of 1211020424 in words is "one billion, two hundred eleven million, twenty thousand, four hundred twenty-four".