211220010109979 has 16 divisors (see below), whose sum is σ = 228474228796800. Its totient is φ = 194109679310976.

The previous prime is 211220010109961. The next prime is 211220010109993. The reversal of 211220010109979 is 979901010022112.

It is a de Polignac number, because none of the positive numbers 2^k-211220010109979 is a prime.

It is a super-2 number, since 2×211220010109979² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211220010109939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49634117 + ... + 53721369.

It is an arithmetic number, because the mean of its divisors is an integer number (14279639299800).

Almost surely, 2^{211220010109979} is an apocalyptic number.

211220010109979 is a deficient number, since it is larger than the sum of its proper divisors (17254218686821).

211220010109979 is a wasteful number, since it uses less digits than its factorization.

211220010109979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104854.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 211220010109979 in words is "two hundred eleven trillion, two hundred twenty billion, ten million, one hundred nine thousand, nine hundred seventy-nine".