21122480371 has 2 divisors, whose sum is σ = 21122480372. Its totient is φ = 21122480370.

The previous prime is 21122480363. The next prime is 21122480377. The reversal of 21122480371 is 17308422112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122480371 - 2³ = 21122480363 is a prime.

It is not a weakly prime, because it can be changed into another prime (21122480377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561240185 + 10561240186.

It is an arithmetic number, because the mean of its divisors is an integer number (10561240186).

Almost surely, 2^21122480371 is an apocalyptic number.

21122480371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122480371 is an equidigital number, since it uses as much as digits as its factorization.

21122480371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 21122480371 in words is "twenty-one billion, one hundred twenty-two million, four hundred eighty thousand, three hundred seventy-one".