75221021011 has 2 divisors, whose sum is σ = 75221021012. Its totient is φ = 75221021010.

The previous prime is 75221021003. The next prime is 75221021041. The reversal of 75221021011 is 11012012257.

It is a weak prime.

It is an emirp because it is prime and its reverse (11012012257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75221021011 - 2³ = 75221021003 is a prime.

It is not a weakly prime, because it can be changed into another prime (75221021041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37610510505 + 37610510506.

It is an arithmetic number, because the mean of its divisors is an integer number (37610510506).

Almost surely, 2^75221021011 is an apocalyptic number.

75221021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

75221021011 is an equidigital number, since it uses as much as digits as its factorization.

75221021011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

Adding to 75221021011 its reverse (11012012257), we get a palindrome (86233033268).

The spelling of 75221021011 in words is "seventy-five billion, two hundred twenty-one million, twenty-one thousand, eleven".