122121211131 has 6 divisors (see below), whose sum is σ = 176397304980. Its totient is φ = 81414140748.

The previous prime is 122121211123. The next prime is 122121211133. The reversal of 122121211131 is 131112121221.

It is a happy number.

It is not a de Polignac number, because 122121211131 - 2³ = 122121211123 is a prime.

It is a super-2 number, since 2×122121211131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122121211133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6784511721 + ... + 6784511738.

It is an arithmetic number, because the mean of its divisors is an integer number (29399550830).

Almost surely, 2^122121211131 is an apocalyptic number.

122121211131 is a deficient number, since it is larger than the sum of its proper divisors (54276093849).

122121211131 is a wasteful number, since it uses less digits than its factorization.

122121211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13569023465 (or 13569023462 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 122121211131 its reverse (131112121221), we get a palindrome (253233332352).

The spelling of 122121211131 in words is "one hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, one hundred thirty-one".