20121200120101 has 8 divisors (see below), whose sum is σ = 20602237932864. Its totient is φ = 19645477642560.

The previous prime is 20121200120081. The next prime is 20121200120123. The reversal of 20121200120101 is 10102100212102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121200120101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200120701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328826145 + ... + 1328841286.

It is an arithmetic number, because the mean of its divisors is an integer number (2575279741608).

Almost surely, 2^{20121200120101} is an apocalyptic number.

It is an amenable number.

20121200120101 is a deficient number, since it is larger than the sum of its proper divisors (481037812763).

20121200120101 is a wasteful number, since it uses less digits than its factorization.

20121200120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657667611.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121200120101 its reverse (10102100212102), we get a palindrome (30223300332203).

It can be divided in two parts, 201212001 and 20101, that added together give a palindrome (201232102).

The spelling of 20121200120101 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, one hundred twenty thousand, one hundred one".