20101212010121 has 16 divisors (see below), whose sum is σ = 22439066926848. Its totient is φ = 17848454878800.

The previous prime is 20101212010111. The next prime is 20101212010151. The reversal of 20101212010121 is 12101021210102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101212010121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20101212010096 and 20101212010105.

It is not an unprimeable number, because it can be changed into a prime (20101212010111) 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, 21656786 + ... + 22565876.

It is an arithmetic number, because the mean of its divisors is an integer number (1402441682928).

Almost surely, 2^{20101212010121} is an apocalyptic number.

It is an amenable number.

20101212010121 is a deficient number, since it is larger than the sum of its proper divisors (2337854916727).

20101212010121 is a wasteful number, since it uses less digits than its factorization.

20101212010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955892.

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

Adding to 20101212010121 its reverse (12101021210102), we get a palindrome (32202233220223).

The spelling of 20101212010121 in words is "twenty trillion, one hundred one billion, two hundred twelve million, ten thousand, one hundred twenty-one".