21022331047 has 2 divisors, whose sum is σ = 21022331048. Its totient is φ = 21022331046.

The previous prime is 21022331023. The next prime is 21022331059. The reversal of 21022331047 is 74013322012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022331047 - 2¹⁵ = 21022298279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022331347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511165523 + 10511165524.

It is an arithmetic number, because the mean of its divisors is an integer number (10511165524).

Almost surely, 2^21022331047 is an apocalyptic number.

21022331047 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022331047 is an equidigital number, since it uses as much as digits as its factorization.

21022331047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 21022331047 its reverse (74013322012), we get a palindrome (95035653059).

The spelling of 21022331047 in words is "twenty-one billion, twenty-two million, three hundred thirty-one thousand, forty-seven".