20120220121001 has 48 divisors (see below), whose sum is σ = 27243601227648. Its totient is φ = 14429139379200.

The previous prime is 20120220120953. The next prime is 20120220121013. The reversal of 20120220121001 is 10012102202102.

It is not a de Polignac number, because 20120220121001 - 2²⁶ = 20120153012137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20120220121021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2091371 + ... + 6679391.

It is an arithmetic number, because the mean of its divisors is an integer number (567575025576).

Almost surely, 2^{20120220121001} is an apocalyptic number.

It is an amenable number.

20120220121001 is a deficient number, since it is larger than the sum of its proper divisors (7123381106647).

20120220121001 is a wasteful number, since it uses less digits than its factorization.

20120220121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4588402 (or 4588389 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20120220121001 its reverse (10012102202102), we get a palindrome (30132322323103).

The spelling of 20120220121001 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, one hundred twenty-one thousand, one".