1201012120121 has 6 divisors (see below), whose sum is σ = 1320120760266. Its totient is φ = 1091829200000.

The previous prime is 1201012120117. The next prime is 1201012120159. The reversal of 1201012120121 is 1210212101021.

It can be written as a sum of positive squares in only one way, i.e., 1152616960000 + 48395160121 = 1073600^2 + 219989^2 .

It is not a de Polignac number, because 1201012120121 - 2² = 1201012120117 is a prime.

It is a super-2 number, since 2×1201012120121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201012120096 and 1201012120105.

It is not an unprimeable number, because it can be changed into a prime (1201012120171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4962859880 + ... + 4962860121.

It is an arithmetic number, because the mean of its divisors is an integer number (220020126711).

Almost surely, 2^{1201012120121} is an apocalyptic number.

1201012120121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201012120121 is a deficient number, since it is larger than the sum of its proper divisors (119108640145).

1201012120121 is an equidigital number, since it uses as much as digits as its factorization.

1201012120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9925720023 (or 9925720012 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1201012120121 its reverse (1210212101021), we get a palindrome (2411224221142).

The spelling of 1201012120121 in words is "one trillion, two hundred one billion, twelve million, one hundred twenty thousand, one hundred twenty-one".