101221211279 has 2 divisors, whose sum is σ = 101221211280. Its totient is φ = 101221211278.

The previous prime is 101221211269. The next prime is 101221211341. The reversal of 101221211279 is 972112122101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101221211279 - 2⁴ = 101221211263 is a prime.

It is a super-2 number, since 2×101221211279² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101221211209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610605639 + 50610605640.

It is an arithmetic number, because the mean of its divisors is an integer number (50610605640).

Almost surely, 2^101221211279 is an apocalyptic number.

101221211279 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221211279 is an equidigital number, since it uses as much as digits as its factorization.

101221211279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 101221211279 in words is "one hundred one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred seventy-nine".