211220120101247 has 2 divisors, whose sum is σ = 211220120101248. Its totient is φ = 211220120101246.

The previous prime is 211220120101183. The next prime is 211220120101259. The reversal of 211220120101247 is 742101021022112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211220120101247 - 2⁶ = 211220120101183 is a prime.

It is a super-2 number, since 2×211220120101247² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211220120101297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610060050623 + 105610060050624.

It is an arithmetic number, because the mean of its divisors is an integer number (105610060050624).

Almost surely, 2^{211220120101247} is an apocalyptic number.

211220120101247 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220120101247 is an equidigital number, since it uses as much as digits as its factorization.

211220120101247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

Adding to 211220120101247 its reverse (742101021022112), we get a palindrome (953321141123359).

The spelling of 211220120101247 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twenty million, one hundred one thousand, two hundred forty-seven".