1211243311001 has 8 divisors (see below), whose sum is σ = 1250716646400. Its totient is φ = 1171795036320.

The previous prime is 1211243310943. The next prime is 1211243311007. The reversal of 1211243311001 is 1001133421121.

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

It is a cyclic number.

It is not a de Polignac number, because 1211243311001 - 2¹⁸ = 1211243048857 is a prime.

It is a super-2 number, since 2×1211243311001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211243311007) 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, 6166916 + ... + 6360293.

It is an arithmetic number, because the mean of its divisors is an integer number (156339580800).

Almost surely, 2^{1211243311001} is an apocalyptic number.

It is an amenable number.

1211243311001 is a deficient number, since it is larger than the sum of its proper divisors (39473335399).

1211243311001 is a wasteful number, since it uses less digits than its factorization.

1211243311001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12530359.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211243311001 its reverse (1001133421121), we get a palindrome (2212376732122).

The spelling of 1211243311001 in words is "one trillion, two hundred eleven billion, two hundred forty-three million, three hundred eleven thousand, one".