20021121021201 has 8 divisors (see below), whose sum is σ = 26736473628384. Its totient is φ = 13326591214080.

The previous prime is 20021121021193. The next prime is 20021121021211. The reversal of 20021121021201 is 10212012112002.

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

It is not a de Polignac number, because 20021121021201 - 2³ = 20021121021193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021121021211) 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, 5205697771 + ... + 5205701616.

It is an arithmetic number, because the mean of its divisors is an integer number (3342059203548).

Almost surely, 2^{20021121021201} is an apocalyptic number.

It is an amenable number.

20021121021201 is a deficient number, since it is larger than the sum of its proper divisors (6715352607183).

20021121021201 is a wasteful number, since it uses less digits than its factorization.

20021121021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10411400031.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20021121021201 its reverse (10212012112002), we get a palindrome (30233133133203).

The spelling of 20021121021201 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, twenty-one thousand, two hundred one".