20120212121101 has 16 divisors (see below), whose sum is σ = 21057429461760. Its totient is φ = 19199905883200.

The previous prime is 20120212121077. The next prime is 20120212121117. The reversal of 20120212121101 is 10112121202102.

It is a cyclic number.

It is not a de Polignac number, because 20120212121101 - 2¹¹ = 20120212119053 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 (20120212151101) 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, 4451605 + ... + 7749658.

It is an arithmetic number, because the mean of its divisors is an integer number (1316089341360).

Almost surely, 2^{20120212121101} is an apocalyptic number.

It is an amenable number.

20120212121101 is a deficient number, since it is larger than the sum of its proper divisors (937217340659).

20120212121101 is a wasteful number, since it uses less digits than its factorization.

20120212121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12201956.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20120212121101 its reverse (10112121202102), we get a palindrome (30232333323203).

The spelling of 20120212121101 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, one hundred one".