20212209499 has 2 divisors, whose sum is σ = 20212209500. Its totient is φ = 20212209498.

The previous prime is 20212209461. The next prime is 20212209527. The reversal of 20212209499 is 99490221202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20212209499 - 2¹⁹ = 20211685211 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212209599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106104749 + 10106104750.

It is an arithmetic number, because the mean of its divisors is an integer number (10106104750).

Almost surely, 2^20212209499 is an apocalyptic number.

20212209499 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212209499 is an equidigital number, since it uses as much as digits as its factorization.

20212209499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 20212209499 in words is "twenty billion, two hundred twelve million, two hundred nine thousand, four hundred ninety-nine".