1001211011197 has 4 divisors (see below), whose sum is σ = 1006452953856. Its totient is φ = 995969068540.

The previous prime is 1001211011123. The next prime is 1001211011221. The reversal of 1001211011197 is 7911101121001.

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-1001211011197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211011117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620971043 + ... + 2620971424.

It is an arithmetic number, because the mean of its divisors is an integer number (251613238464).

Almost surely, 2^{1001211011197} is an apocalyptic number.

It is an amenable number.

1001211011197 is a deficient number, since it is larger than the sum of its proper divisors (5241942659).

1001211011197 is an equidigital number, since it uses as much as digits as its factorization.

1001211011197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241942658.

The product of its (nonzero) digits is 126, while the sum is 25.

Adding to 1001211011197 its reverse (7911101121001), we get a palindrome (8912312132198).

The spelling of 1001211011197 in words is "one trillion, one billion, two hundred eleven million, eleven thousand, one hundred ninety-seven".