122520211311 has 8 divisors (see below), whose sum is σ = 168629968384. Its totient is φ = 79045297560.

The previous prime is 122520211189. The next prime is 122520211339. The reversal of 122520211311 is 113112025221.

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

It is not a de Polignac number, because 122520211311 - 2¹⁷ = 122520080239 is a prime.

It is a super-2 number, since 2×122520211311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122520211351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658710721 + ... + 658710906.

It is an arithmetic number, because the mean of its divisors is an integer number (21078746048).

Almost surely, 2^122520211311 is an apocalyptic number.

122520211311 is a deficient number, since it is larger than the sum of its proper divisors (46109757073).

122520211311 is a wasteful number, since it uses less digits than its factorization.

122520211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317421661.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 122520211311 its reverse (113112025221), we get a palindrome (235632236532).

The spelling of 122520211311 in words is "one hundred twenty-two billion, five hundred twenty million, two hundred eleven thousand, three hundred eleven".