1201000120121 has 4 divisors (see below), whose sum is σ = 1253217516672. Its totient is φ = 1148782723572.

The previous prime is 1201000120091. The next prime is 1201000120153. The reversal of 1201000120121 is 1210210001021.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201000120121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201000120171) 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, 26108698241 + ... + 26108698286.

It is an arithmetic number, because the mean of its divisors is an integer number (313304379168).

Almost surely, 2^{1201000120121} is an apocalyptic number.

It is an amenable number.

1201000120121 is a deficient number, since it is larger than the sum of its proper divisors (52217396551).

1201000120121 is an equidigital number, since it uses as much as digits as its factorization.

1201000120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52217396550.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1201000120121 its reverse (1210210001021), we get a palindrome (2411210121142).

The spelling of 1201000120121 in words is "one trillion, two hundred one billion, one hundred twenty thousand, one hundred twenty-one".