1211230031001 has 16 divisors (see below), whose sum is σ = 1723025037888. Its totient is φ = 754186035200.

The previous prime is 1211230030993. The next prime is 1211230031021. The reversal of 1211230031001 is 1001300321121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1211230031001 - 2³ = 1211230030993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211230031021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90640680 + ... + 90654041.

It is an arithmetic number, because the mean of its divisors is an integer number (107689064868).

Almost surely, 2^{1211230031001} is an apocalyptic number.

It is an amenable number.

1211230031001 is a deficient number, since it is larger than the sum of its proper divisors (511795006887).

1211230031001 is a wasteful number, since it uses less digits than its factorization.

1211230031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181294872.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1211230031001 its reverse (1001300321121), we get a palindrome (2212530352122).

The spelling of 1211230031001 in words is "one trillion, two hundred eleven billion, two hundred thirty million, thirty-one thousand, one".