1211012233001 has 4 divisors (see below), whose sum is σ = 1211014591104. Its totient is φ = 1211009874900.

The previous prime is 1211012232929. The next prime is 1211012233043. The reversal of 1211012233001 is 1003322101121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211012233001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211012233091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45365 + ... + 1556946.

It is an arithmetic number, because the mean of its divisors is an integer number (302753647776).

Almost surely, 2^{1211012233001} is an apocalyptic number.

It is an amenable number.

1211012233001 is a deficient number, since it is larger than the sum of its proper divisors (2358103).

1211012233001 is an equidigital number, since it uses as much as digits as its factorization.

1211012233001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358102.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1211012233001 its reverse (1003322101121), we get a palindrome (2214334334122).

The spelling of 1211012233001 in words is "one trillion, two hundred eleven billion, twelve million, two hundred thirty-three thousand, one".