121102001 has 2 divisors, whose sum is σ = 121102002. Its totient is φ = 121102000.

The previous prime is 121101997. The next prime is 121102013. The reversal of 121102001 is 100201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79834225 + 41267776 = 8935^2 + 6424^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102001 - 2² = 121101997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121102001.

It is not a weakly prime, because it can be changed into another prime (121102021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551000 + 60551001.

It is an arithmetic number, because the mean of its divisors is an integer number (60551001).

Almost surely, 2^121102001 is an apocalyptic number.

It is an amenable number.

121102001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102001 is an equidigital number, since it uses as much as digits as its factorization.

121102001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 121102001 is about 11004.6354323985. The cubic root of 121102001 is about 494.7476876219.

Adding to 121102001 its reverse (100201121), we get a palindrome (221303122).

The spelling of 121102001 in words is "one hundred twenty-one million, one hundred two thousand, one".