1211020042 has 8 divisors (see below), whose sum is σ = 1843642656. Its totient is φ = 596472492.

The previous prime is 1211020037. The next prime is 1211020061. The reversal of 1211020042 is 2400201121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4518598 + ... + 4518865.

It is an arithmetic number, because the mean of its divisors is an integer number (230455332).

Almost surely, 2^1211020042 is an apocalyptic number.

1211020042 is a deficient number, since it is larger than the sum of its proper divisors (632622614).

1211020042 is an equidigital number, since it uses as much as digits as its factorization.

1211020042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037532.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1211020042 is about 34799.7132459450. The cubic root of 1211020042 is about 1065.9015904142.

Adding to 1211020042 its reverse (2400201121), we get a palindrome (3611221163).

The spelling of 1211020042 in words is "one billion, two hundred eleven million, twenty thousand, forty-two".