211221130329979 has 32 divisors (see below), whose sum is σ = 263811065633280. Its totient is φ = 164294007609600.

The previous prime is 211221130329971. The next prime is 211221130329983. The reversal of 211221130329979 is 979923031122112.

It is not a de Polignac number, because 211221130329979 - 2³ = 211221130329971 is a prime.

It is a super-2 number, since 2×211221130329979² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221130329971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186379752 + ... + 187509610.

It is an arithmetic number, because the mean of its divisors is an integer number (8244095801040).

Almost surely, 2^{211221130329979} is an apocalyptic number.

211221130329979 is a deficient number, since it is larger than the sum of its proper divisors (52589935303301).

211221130329979 is a wasteful number, since it uses less digits than its factorization.

211221130329979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134211.

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 211221130329979 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred thirty million, three hundred twenty-nine thousand, nine hundred seventy-nine".