1211131004 has 24 divisors (see below), whose sum is σ = 2142277200. Its totient is φ = 599085056.

The previous prime is 1211131001. The next prime is 1211131007. The reversal of 1211131004 is 4001311121.

It is an interprime number because it is at equal distance from previous prime (1211131001) and next prime (1211131007).

It is a self number, because there is not a number n which added to its sum of digits gives 1211131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211131001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149219 + ... + 157125.

It is an arithmetic number, because the mean of its divisors is an integer number (89261550).

Almost surely, 2^1211131004 is an apocalyptic number.

It is an amenable number.

1211131004 is a deficient number, since it is larger than the sum of its proper divisors (931146196).

1211131004 is a wasteful number, since it uses less digits than its factorization.

1211131004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317 (or 8315 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1211131004 is about 34801.3075041729. The cubic root of 1211131004 is about 1065.9341445025.

Adding to 1211131004 its reverse (4001311121), we get a palindrome (5212442125).

The spelling of 1211131004 in words is "one billion, two hundred eleven million, one hundred thirty-one thousand, four".