1211020442 has 16 divisors (see below), whose sum is σ = 1924326240. Its totient is φ = 569984688.

The previous prime is 1211020439. The next prime is 1211020451. The reversal of 1211020442 is 2440201121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211020442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95528 + ... + 107459.

It is an arithmetic number, because the mean of its divisors is an integer number (120270390).

Almost surely, 2^1211020442 is an apocalyptic number.

1211020442 is a deficient number, since it is larger than the sum of its proper divisors (713305798).

1211020442 is a wasteful number, since it uses less digits than its factorization.

1211020442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203165.

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

The square root of 1211020442 is about 34799.7189931183. The cubic root of 1211020442 is about 1065.9017077700.

Adding to 1211020442 its reverse (2440201121), we get a palindrome (3651221563).

The spelling of 1211020442 in words is "one billion, two hundred eleven million, twenty thousand, four hundred forty-two".