20121102001 has 16 divisors (see below), whose sum is σ = 27015746688. Its totient is φ = 14472720000.

The previous prime is 20121101963. The next prime is 20121102007. The reversal of 20121102001 is 10020112102.

It is a cyclic number.

It is not a de Polignac number, because 20121102001 - 2⁷ = 20121101873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121102007) 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, 10049500 + ... + 10051501.

It is an arithmetic number, because the mean of its divisors is an integer number (1688484168).

Almost surely, 2^20121102001 is an apocalyptic number.

It is an amenable number.

20121102001 is a deficient number, since it is larger than the sum of its proper divisors (6894644687).

20121102001 is a wasteful number, since it uses less digits than its factorization.

20121102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20101032.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20121102001 its reverse (10020112102), we get a palindrome (30141214103).

The spelling of 20121102001 in words is "twenty billion, one hundred twenty-one million, one hundred two thousand, one".