21022012021943 has 2 divisors, whose sum is σ = 21022012021944. Its totient is φ = 21022012021942.

The previous prime is 21022012021931. The next prime is 21022012022027. The reversal of 21022012021943 is 34912021022012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022012021943 - 2¹⁴ = 21022012005559 is a prime.

It is a super-2 number, since 2×21022012021943² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022012021243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511006010971 + 10511006010972.

It is an arithmetic number, because the mean of its divisors is an integer number (10511006010972).

Almost surely, 2^{21022012021943} is an apocalyptic number.

21022012021943 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022012021943 is an equidigital number, since it uses as much as digits as its factorization.

21022012021943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 21022012021943 its reverse (34912021022012), we get a palindrome (55934033043955).

The spelling of 21022012021943 in words is "twenty-one trillion, twenty-two billion, twelve million, twenty-one thousand, nine hundred forty-three".