221311110029 has 2 divisors, whose sum is σ = 221311110030. Its totient is φ = 221311110028.

The previous prime is 221311109947. The next prime is 221311110037. The reversal of 221311110029 is 920011113122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208269013225 + 13042096804 = 456365^2 + 114202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221311110029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221311109986 and 221311110013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221311110089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655555014 + 110655555015.

It is an arithmetic number, because the mean of its divisors is an integer number (110655555015).

Almost surely, 2^221311110029 is an apocalyptic number.

It is an amenable number.

221311110029 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311110029 is an equidigital number, since it uses as much as digits as its factorization.

221311110029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 221311110029 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred ten thousand, twenty-nine".