20120121102001 has 8 divisors (see below), whose sum is σ = 20192622247424. Its totient is φ = 20047719207600.

The previous prime is 20120121101999. The next prime is 20120121102043. The reversal of 20120121102001 is 10020112102102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20120121102001 - 2¹ = 20120121101999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120121102061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24406575 + ... + 25217476.

It is an arithmetic number, because the mean of its divisors is an integer number (2524077780928).

Almost surely, 2^{20120121102001} is an apocalyptic number.

It is an amenable number.

20120121102001 is a deficient number, since it is larger than the sum of its proper divisors (72501145423).

20120121102001 is a wasteful number, since it uses less digits than its factorization.

20120121102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49625511.

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

Adding to 20120121102001 its reverse (10020112102102), we get a palindrome (30140233204103).

The spelling of 20120121102001 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-one million, one hundred two thousand, one".