1131211002000 has 160 divisors (see below), whose sum is σ = 3655695199104. Its totient is φ = 300939072000.

The previous prime is 1131211001969. The next prime is 1131211002001. The reversal of 1131211002000 is 2001121311.

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

It is not an unprimeable number, because it can be changed into a prime (1131211002001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2302087 + ... + 2749913.

Almost surely, 2^{1131211002000} is an apocalyptic number.

1131211002000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131211002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827847599552).

1131211002000 is an abundant number, since it is smaller than the sum of its proper divisors (2524484197104).

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

1131211002000 is a wasteful number, since it uses less digits than its factorization.

1131211002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448274 (or 448258 counting only the distinct ones).

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

Adding to 1131211002000 its reverse (2001121311), we get a palindrome (1133212123311).

The spelling of 1131211002000 in words is "one trillion, one hundred thirty-one billion, two hundred eleven million, two thousand".