2121102111197 has 2 divisors, whose sum is σ = 2121102111198. Its totient is φ = 2121102111196.

The previous prime is 2121102111133. The next prime is 2121102111217. The reversal of 2121102111197 is 7911112011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2071221802276 + 49880308921 = 1439174^2 + 223339^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121102111197 - 2⁶ = 2121102111133 is a prime.

It is a super-2 number, since 2×2121102111197² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121102111697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060551055598 + 1060551055599.

It is an arithmetic number, because the mean of its divisors is an integer number (1060551055599).

Almost surely, 2^{2121102111197} is an apocalyptic number.

It is an amenable number.

2121102111197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121102111197 is an equidigital number, since it uses as much as digits as its factorization.

2121102111197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 29.

The spelling of 2121102111197 in words is "two trillion, one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, one hundred ninety-seven".