21212024971 has 2 divisors, whose sum is σ = 21212024972. Its totient is φ = 21212024970.

The previous prime is 21212024917. The next prime is 21212025019. The reversal of 21212024971 is 17942021212.

Together with previous prime (21212024917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212024971 - 2¹⁹ = 21211500683 is a prime.

It is not a weakly prime, because it can be changed into another prime (21212027971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606012485 + 10606012486.

It is an arithmetic number, because the mean of its divisors is an integer number (10606012486).

Almost surely, 2^21212024971 is an apocalyptic number.

21212024971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212024971 is an equidigital number, since it uses as much as digits as its factorization.

21212024971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 21212024971 in words is "twenty-one billion, two hundred twelve million, twenty-four thousand, nine hundred seventy-one".