121201100197 has 4 divisors (see below), whose sum is σ = 121926855456. Its totient is φ = 120475344940.

The previous prime is 121201100147. The next prime is 121201100227. The reversal of 121201100197 is 791001102121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 791001102121 = 149 ⋅5308732229.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121201100197 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 (121201100107) 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, 362877379 + ... + 362877712.

It is an arithmetic number, because the mean of its divisors is an integer number (30481713864).

Almost surely, 2^121201100197 is an apocalyptic number.

It is an amenable number.

121201100197 is a deficient number, since it is larger than the sum of its proper divisors (725755259).

121201100197 is an equidigital number, since it uses as much as digits as its factorization.

121201100197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725755258.

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

The spelling of 121201100197 in words is "one hundred twenty-one billion, two hundred one million, one hundred thousand, one hundred ninety-seven".