20121102011001 has 16 divisors (see below), whose sum is σ = 27452203644096. Its totient is φ = 13102037772096.

The previous prime is 20121102010979. The next prime is 20121102011009. The reversal of 20121102011001 is 10011020112102.

It is a de Polignac number, because none of the positive numbers 2^k-20121102011001 is a prime.

It is a super-2 number, since 2×20121102011001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121102011009) 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, 30266491 + ... + 30924143.

It is an arithmetic number, because the mean of its divisors is an integer number (1715762727756).

Almost surely, 2^{20121102011001} is an apocalyptic number.

It is an amenable number.

20121102011001 is a deficient number, since it is larger than the sum of its proper divisors (7331101633095).

20121102011001 is a wasteful number, since it uses less digits than its factorization.

20121102011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894872.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20121102011001 its reverse (10011020112102), we get a palindrome (30132122123103).

The spelling of 20121102011001 in words is "twenty trillion, one hundred twenty-one billion, one hundred two million, eleven thousand, one".