20121020221101 has 32 divisors (see below), whose sum is σ = 27137439288960. Its totient is φ = 13260156364800.

The previous prime is 20121020221069. The next prime is 20121020221103. The reversal of 20121020221101 is 10112202012102.

It is not a de Polignac number, because 20121020221101 - 2⁵ = 20121020221069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121020221103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880442791 + ... + 880465643.

It is an arithmetic number, because the mean of its divisors is an integer number (848044977780).

Almost surely, 2^{20121020221101} is an apocalyptic number.

It is an amenable number.

20121020221101 is a deficient number, since it is larger than the sum of its proper divisors (7016419067859).

20121020221101 is a wasteful number, since it uses less digits than its factorization.

20121020221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31997.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121020221101 its reverse (10112202012102), we get a palindrome (30233222233203).

The spelling of 20121020221101 in words is "twenty trillion, one hundred twenty-one billion, twenty million, two hundred twenty-one thousand, one hundred one".