211220002201979 has 2 divisors, whose sum is σ = 211220002201980. Its totient is φ = 211220002201978.

The previous prime is 211220002201969. The next prime is 211220002202047. The reversal of 211220002201979 is 979102200022112.

211220002201979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211220002201979 - 2⁴ = 211220002201963 is a prime.

It is a super-2 number, since 2×211220002201979² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211220002201969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610001100989 + 105610001100990.

It is an arithmetic number, because the mean of its divisors is an integer number (105610001100990).

Almost surely, 2^{211220002201979} is an apocalyptic number.

211220002201979 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220002201979 is an equidigital number, since it uses as much as digits as its factorization.

211220002201979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 211220002201979 in words is "two hundred eleven trillion, two hundred twenty billion, two million, two hundred one thousand, nine hundred seventy-nine".