1211001002 has 16 divisors (see below), whose sum is σ = 1870170720. Its totient is φ = 587783952.

The previous prime is 1211000971. The next prime is 1211001023. The reversal of 1211001002 is 2001001121.

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 7 ways as a sum of consecutive naturals, for example, 29177 + ... + 57212.

It is an arithmetic number, because the mean of its divisors is an integer number (116885670).

Almost surely, 2^1211001002 is an apocalyptic number.

1211001002 is a deficient number, since it is larger than the sum of its proper divisors (659169718).

1211001002 is a wasteful number, since it uses less digits than its factorization.

1211001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86597.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1211001002 is about 34799.4396793971. The cubic root of 1211001002 is about 1065.8960042494.

Adding to 1211001002 its reverse (2001001121), we get a palindrome (3212002123).

The spelling of 1211001002 in words is "one billion, two hundred eleven million, one thousand, two".