21220101212903 has 2 divisors, whose sum is σ = 21220101212904. Its totient is φ = 21220101212902.

The previous prime is 21220101212881. The next prime is 21220101212911. The reversal of 21220101212903 is 30921210102212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220101212903 - 2⁸ = 21220101212647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220101212803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610050606451 + 10610050606452.

It is an arithmetic number, because the mean of its divisors is an integer number (10610050606452).

Almost surely, 2^{21220101212903} is an apocalyptic number.

21220101212903 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220101212903 is an equidigital number, since it uses as much as digits as its factorization.

21220101212903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21220101212903 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred twelve thousand, nine hundred three".