20021121201 has 8 divisors (see below), whose sum is σ = 26775478624. Its totient is φ = 13307088960.

The previous prime is 20021121193. The next prime is 20021121217. The reversal of 20021121201 is 10212112002.

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

It is not a de Polignac number, because 20021121201 - 2³ = 20021121193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021821201) 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, 10080136 + ... + 10082121.

It is an arithmetic number, because the mean of its divisors is an integer number (3346934828).

Almost surely, 2^20021121201 is an apocalyptic number.

It is an amenable number.

20021121201 is a deficient number, since it is larger than the sum of its proper divisors (6754357423).

20021121201 is a wasteful number, since it uses less digits than its factorization.

20021121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20162591.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021121201 its reverse (10212112002), we get a palindrome (30233233203).

The spelling of 20021121201 in words is "twenty billion, twenty-one million, one hundred twenty-one thousand, two hundred one".