221100021010073 has 2 divisors, whose sum is σ = 221100021010074. Its totient is φ = 221100021010072.

The previous prime is 221100021010031. The next prime is 221100021010097. The reversal of 221100021010073 is 370010120001122.

221100021010073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151742904649609 + 69357116360464 = 12318397^2 + 8328092^2 .

It is a cyclic number.

It is not a de Polignac number, because 221100021010073 - 2¹² = 221100021005977 is a prime.

It is not a weakly prime, because it can be changed into another prime (221100021010873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550010505036 + 110550010505037.

It is an arithmetic number, because the mean of its divisors is an integer number (110550010505037).

Almost surely, 2^{221100021010073} is an apocalyptic number.

It is an amenable number.

221100021010073 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100021010073 is an equidigital number, since it uses as much as digits as its factorization.

221100021010073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 221100021010073 its reverse (370010120001122), we get a palindrome (591110141011195).

The spelling of 221100021010073 in words is "two hundred twenty-one trillion, one hundred billion, twenty-one million, ten thousand, seventy-three".