122111999971 has 8 divisors (see below), whose sum is σ = 131511707600. Its totient is φ = 112713217632.

The previous prime is 122111999969. The next prime is 122111999987. The reversal of 122111999971 is 179999111221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122111999971 - 2¹ = 122111999969 is a prime.

It is a super-2 number, since 2×122111999971² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122111999941) 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 7 ways as a sum of consecutive naturals, for example, 56005 + ... + 497353.

It is an arithmetic number, because the mean of its divisors is an integer number (16438963450).

Almost surely, 2^122111999971 is an apocalyptic number.

122111999971 is a deficient number, since it is larger than the sum of its proper divisors (9399707629).

122111999971 is a wasteful number, since it uses less digits than its factorization.

122111999971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462645.

The product of its digits is 183708, while the sum is 52.

The spelling of 122111999971 in words is "one hundred twenty-two billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-one".