2111020220321 has 2 divisors, whose sum is σ = 2111020220322. Its totient is φ = 2111020220320.

The previous prime is 2111020220317. The next prime is 2111020220327. The reversal of 2111020220321 is 1230220201112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1740985247296 + 370034973025 = 1319464^2 + 608305^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111020220321 - 2² = 2111020220317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111020220321.

It is not a weakly prime, because it can be changed into another prime (2111020220327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055510110160 + 1055510110161.

It is an arithmetic number, because the mean of its divisors is an integer number (1055510110161).

Almost surely, 2^{2111020220321} is an apocalyptic number.

It is an amenable number.

2111020220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111020220321 is an equidigital number, since it uses as much as digits as its factorization.

2111020220321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2111020220321 its reverse (1230220201112), we get a palindrome (3341240421433).

The spelling of 2111020220321 in words is "two trillion, one hundred eleven billion, twenty million, two hundred twenty thousand, three hundred twenty-one".