2210021978443 has 2 divisors, whose sum is σ = 2210021978444. Its totient is φ = 2210021978442.

The previous prime is 2210021978429. The next prime is 2210021978471. The reversal of 2210021978443 is 3448791200122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2210021978443 - 2⁹ = 2210021977931 is a prime.

It is a super-2 number, since 2×2210021978443² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2210021978443.

It is not a weakly prime, because it can be changed into another prime (2210021918443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105010989221 + 1105010989222.

It is an arithmetic number, because the mean of its divisors is an integer number (1105010989222).

Almost surely, 2^{2210021978443} is an apocalyptic number.

2210021978443 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210021978443 is an equidigital number, since it uses as much as digits as its factorization.

2210021978443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 2210021978443 in words is "two trillion, two hundred ten billion, twenty-one million, nine hundred seventy-eight thousand, four hundred forty-three".