1211022201097 has 2 divisors, whose sum is σ = 1211022201098. Its totient is φ = 1211022201096.

The previous prime is 1211022201091. The next prime is 1211022201113. The reversal of 1211022201097 is 7901022201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137900092176 + 73122108921 = 1066724^2 + 270411^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211022201097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211022201091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605511100548 + 605511100549.

It is an arithmetic number, because the mean of its divisors is an integer number (605511100549).

Almost surely, 2^{1211022201097} is an apocalyptic number.

It is an amenable number.

1211022201097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211022201097 is an equidigital number, since it uses as much as digits as its factorization.

1211022201097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

The spelling of 1211022201097 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred one thousand, ninety-seven".