21220211010923 has 2 divisors, whose sum is σ = 21220211010924. Its totient is φ = 21220211010922.

The previous prime is 21220211010913. The next prime is 21220211011003. The reversal of 21220211010923 is 32901011202212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220211010923 - 2³⁴ = 21203031141739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21220211010892 and 21220211010901.

It is not a weakly prime, because it can be changed into another prime (21220211010913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610105505461 + 10610105505462.

It is an arithmetic number, because the mean of its divisors is an integer number (10610105505462).

Almost surely, 2^{21220211010923} is an apocalyptic number.

21220211010923 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220211010923 is an equidigital number, since it uses as much as digits as its factorization.

21220211010923 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 21220211010923 in words is "twenty-one trillion, two hundred twenty billion, two hundred eleven million, ten thousand, nine hundred twenty-three".