1201212112001 has 16 divisors (see below), whose sum is σ = 1314778699968. Its totient is φ = 1088374060800.

The previous prime is 1201212111997. The next prime is 1201212112039. The reversal of 1201212112001 is 1002112121021.

It is a cyclic number.

It is not a de Polignac number, because 1201212112001 - 2² = 1201212111997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201212112081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31281125 + ... + 31319501.

It is an arithmetic number, because the mean of its divisors is an integer number (82173668748).

Almost surely, 2^{1201212112001} is an apocalyptic number.

1201212112001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201212112001 is a deficient number, since it is larger than the sum of its proper divisors (113566587967).

1201212112001 is a wasteful number, since it uses less digits than its factorization.

1201212112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47792.

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

Adding to 1201212112001 its reverse (1002112121021), we get a palindrome (2203324233022).

It can be divided in two parts, 120 and 1212112001, that added together give a palindrome (1212112121).

The spelling of 1201212112001 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred twelve thousand, one".