121211121203 has 2 divisors, whose sum is σ = 121211121204. Its totient is φ = 121211121202.

The previous prime is 121211121173. The next prime is 121211121223. The reversal of 121211121203 is 302121112121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121211121203 - 2¹² = 121211117107 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605560601 + 60605560602.

It is an arithmetic number, because the mean of its divisors is an integer number (60605560602).

Almost surely, 2^121211121203 is an apocalyptic number.

121211121203 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211121203 is an equidigital number, since it uses as much as digits as its factorization.

121211121203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121211121203 its reverse (302121112121), we get a palindrome (423332233324).

The spelling of 121211121203 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred three".