221121000021011 has 2 divisors, whose sum is σ = 221121000021012. Its totient is φ = 221121000021010.

The previous prime is 221121000021001. The next prime is 221121000021037. The reversal of 221121000021011 is 110120000121122.

221121000021011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221121000021011 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121000021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560500010505 + 110560500010506.

It is an arithmetic number, because the mean of its divisors is an integer number (110560500010506).

Almost surely, 2^{221121000021011} is an apocalyptic number.

221121000021011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121000021011 is an equidigital number, since it uses as much as digits as its factorization.

221121000021011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121000021011 its reverse (110120000121122), we get a palindrome (331241000142133).

The spelling of 221121000021011 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty-one thousand, eleven".