2021311200121 has 2 divisors, whose sum is σ = 2021311200122. Its totient is φ = 2021311200120.

The previous prime is 2021311200101. The next prime is 2021311200149. The reversal of 2021311200121 is 1210021131202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1939992122896 + 81319077225 = 1392836^2 + 285165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021311200121 - 2²³ = 2021302811513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021311200095 and 2021311200104.

It is not a weakly prime, because it can be changed into another prime (2021311200101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010655600060 + 1010655600061.

It is an arithmetic number, because the mean of its divisors is an integer number (1010655600061).

Almost surely, 2^{2021311200121} is an apocalyptic number.

It is an amenable number.

2021311200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021311200121 is an equidigital number, since it uses as much as digits as its factorization.

2021311200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 2021311200121 its reverse (1210021131202), we get a palindrome (3231332331323).

The spelling of 2021311200121 in words is "two trillion, twenty-one billion, three hundred eleven million, two hundred thousand, one hundred twenty-one".