22000010021971 has 2 divisors, whose sum is σ = 22000010021972. Its totient is φ = 22000010021970.

The previous prime is 22000010021921. The next prime is 22000010022031. The reversal of 22000010021971 is 17912001000022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22000010021971 - 2⁹ = 22000010021459 is a prime.

It is not a weakly prime, because it can be changed into another prime (22000010021921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000005010985 + 11000005010986.

It is an arithmetic number, because the mean of its divisors is an integer number (11000005010986).

Almost surely, 2^{22000010021971} is an apocalyptic number.

22000010021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000010021971 is an equidigital number, since it uses as much as digits as its factorization.

22000010021971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 22000010021971 its reverse (17912001000022), we get a palindrome (39912011021993).

The spelling of 22000010021971 in words is "twenty-two trillion, ten million, twenty-one thousand, nine hundred seventy-one".