20121101 has 16 divisors (see below), whose sum is σ = 27017088. Its totient is φ = 14472000.

The previous prime is 20121097. The next prime is 20121103. The reversal of 20121101 is 10112102.

It is a cyclic number.

It is not a de Polignac number, because 20121101 - 2² = 20121097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121103) 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, 9050 + ... + 11051.

It is an arithmetic number, because the mean of its divisors is an integer number (1688568).

Almost surely, 2^20121101 is an apocalyptic number.

It is an amenable number.

20121101 is a deficient number, since it is larger than the sum of its proper divisors (6895987).

20121101 is a wasteful number, since it uses less digits than its factorization.

20121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 20121101 is about 4485.6550246313. The cubic root of 20121101 is about 271.9885240617.

Adding to 20121101 its reverse (10112102), we get a palindrome (30233203).

It can be divided in two parts, 2012 and 1101, that added together give a palindrome (3113).

The spelling of 20121101 in words is "twenty million, one hundred twenty-one thousand, one hundred one".