122121110101 has 4 divisors (see below), whose sum is σ = 125099673804. Its totient is φ = 119142546400.

The previous prime is 122121110047. The next prime is 122121110107. The reversal of 122121110101 is 101011121221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101011121221 = 2791 ⋅36191731.

It can be written as a sum of positive squares in 2 ways, for example, as 47154122500 + 74966987601 = 217150^2 + 273801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122121110101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121110107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1489281790 + ... + 1489281871.

It is an arithmetic number, because the mean of its divisors is an integer number (31274918451).

Almost surely, 2^122121110101 is an apocalyptic number.

It is an amenable number.

122121110101 is a deficient number, since it is larger than the sum of its proper divisors (2978563703).

122121110101 is an equidigital number, since it uses as much as digits as its factorization.

122121110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978563702.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 122121110101 its reverse (101011121221), we get a palindrome (223132231322).

The spelling of 122121110101 in words is "one hundred twenty-two billion, one hundred twenty-one million, one hundred ten thousand, one hundred one".