20021121022201 has 24 divisors (see below), whose sum is σ = 21986774545536. Its totient is φ = 18219286874880.

The previous prime is 20021121022193. The next prime is 20021121022249. The reversal of 20021121022201 is 10222012112002.

It is a happy number.

It is not a de Polignac number, because 20021121022201 - 2³ = 20021121022193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021121022291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168322516 + ... + 168441418.

It is an arithmetic number, because the mean of its divisors is an integer number (916115606064).

Almost surely, 2^{20021121022201} is an apocalyptic number.

It is an amenable number.

20021121022201 is a deficient number, since it is larger than the sum of its proper divisors (1965653523335).

20021121022201 is a wasteful number, since it uses less digits than its factorization.

20021121022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133033 (or 133020 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021121022201 its reverse (10222012112002), we get a palindrome (30243133134203).

The spelling of 20021121022201 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred one".