121201001123 has 2 divisors, whose sum is σ = 121201001124. Its totient is φ = 121201001122.

The previous prime is 121201001099. The next prime is 121201001153. The reversal of 121201001123 is 321100102121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121201001123 - 2¹⁸ = 121200738979 is a prime.

It is a super-2 number, since 2×121201001123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121201001098 and 121201001107.

It is not a weakly prime, because it can be changed into another prime (121201001153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600500561 + 60600500562.

It is an arithmetic number, because the mean of its divisors is an integer number (60600500562).

Almost surely, 2^121201001123 is an apocalyptic number.

121201001123 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201001123 is an equidigital number, since it uses as much as digits as its factorization.

121201001123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121201001123 its reverse (321100102121), we get a palindrome (442301103244).

The spelling of 121201001123 in words is "one hundred twenty-one billion, two hundred one million, one thousand, one hundred twenty-three".