20121100122001 has 32 divisors (see below), whose sum is σ = 23370351943680. Its totient is φ = 17214767222400.

The previous prime is 20121100121999. The next prime is 20121100122041. The reversal of 20121100122001 is 10022100112102.

It is a cyclic number.

It is not a de Polignac number, because 20121100122001 - 2¹ = 20121100121999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121100122041) 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, 17557755 + ... + 18668608.

It is an arithmetic number, because the mean of its divisors is an integer number (730323498240).

Almost surely, 2^{20121100122001} is an apocalyptic number.

It is an amenable number.

20121100122001 is a deficient number, since it is larger than the sum of its proper divisors (3249251821679).

20121100122001 is a wasteful number, since it uses less digits than its factorization.

20121100122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36226477.

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

Adding to 20121100122001 its reverse (10022100112102), we get a palindrome (30143200234103).

The spelling of 20121100122001 in words is "twenty trillion, one hundred twenty-one billion, one hundred million, one hundred twenty-two thousand, one".