1211012004 has 24 divisors (see below), whose sum is σ = 2826947200. Its totient is φ = 403491744.

The previous prime is 1211011951. The next prime is 1211012021. The reversal of 1211012004 is 4002101121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 7422 + ... + 49770.

Almost surely, 2^1211012004 is an apocalyptic number.

It is an amenable number.

1211012004 is an abundant number, since it is smaller than the sum of its proper divisors (1615935196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211012004 is a wasteful number, since it uses less digits than its factorization.

1211012004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44739 (or 44737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1211012004 is about 34799.5977562960. The cubic root of 1211012004 is about 1065.8992321444.

Adding to 1211012004 its reverse (4002101121), we get a palindrome (5213113125).

The spelling of 1211012004 in words is "one billion, two hundred eleven million, twelve thousand, four".