21120100021967 has 2 divisors, whose sum is σ = 21120100021968. Its totient is φ = 21120100021966.

The previous prime is 21120100021963. The next prime is 21120100022009. The reversal of 21120100021967 is 76912000102112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120100021967 - 2² = 21120100021963 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120100021963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560050010983 + 10560050010984.

It is an arithmetic number, because the mean of its divisors is an integer number (10560050010984).

Almost surely, 2^{21120100021967} is an apocalyptic number.

21120100021967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120100021967 is an equidigital number, since it uses as much as digits as its factorization.

21120100021967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 32.

The spelling of 21120100021967 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, twenty-one thousand, nine hundred sixty-seven".