1000211021197 has 2 divisors, whose sum is σ = 1000211021198. Its totient is φ = 1000211021196.

The previous prime is 1000211021107. The next prime is 1000211021221. The reversal of 1000211021197 is 7911201120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539510816196 + 460700205001 = 734514^2 + 678749^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000211021197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000211021107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500105510598 + 500105510599.

It is an arithmetic number, because the mean of its divisors is an integer number (500105510599).

Almost surely, 2^{1000211021197} is an apocalyptic number.

It is an amenable number.

1000211021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000211021197 is an equidigital number, since it uses as much as digits as its factorization.

1000211021197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 1000211021197 its reverse (7911201120001), we get a palindrome (8911412141198).

The spelling of 1000211021197 in words is "one trillion, two hundred eleven million, twenty-one thousand, one hundred ninety-seven".