21220101078233 has 2 divisors, whose sum is σ = 21220101078234. Its totient is φ = 21220101078232.

The previous prime is 21220101078229. The next prime is 21220101078299. The reversal of 21220101078233 is 33287010102212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10907345101129 + 10312755977104 = 3302627^2 + 3211348^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220101078233 - 2² = 21220101078229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21220101078233.

It is not a weakly prime, because it can be changed into another prime (21220101078433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610050539116 + 10610050539117.

It is an arithmetic number, because the mean of its divisors is an integer number (10610050539117).

Almost surely, 2^{21220101078233} is an apocalyptic number.

It is an amenable number.

21220101078233 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220101078233 is an equidigital number, since it uses as much as digits as its factorization.

21220101078233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 21220101078233 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, seventy-eight thousand, two hundred thirty-three".