2020001021221 has 2 divisors, whose sum is σ = 2020001021222. Its totient is φ = 2020001021220.

The previous prime is 2020001021201. The next prime is 2020001021263. The reversal of 2020001021221 is 1221201000202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1994057476321 + 25943544900 = 1412111^2 + 161070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020001021221 - 2²³ = 2019992632613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020001021201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010000510610 + 1010000510611.

It is an arithmetic number, because the mean of its divisors is an integer number (1010000510611).

Almost surely, 2^{2020001021221} is an apocalyptic number.

It is an amenable number.

2020001021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020001021221 is an equidigital number, since it uses as much as digits as its factorization.

2020001021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2020001021221 its reverse (1221201000202), we get a palindrome (3241202021423).

It can be divided in two parts, 202000 and 1021221, that added together give a palindrome (1223221).

The spelling of 2020001021221 in words is "two trillion, twenty billion, one million, twenty-one thousand, two hundred twenty-one".