122011210121 has 4 divisors (see below), whose sum is σ = 122164299012. Its totient is φ = 121858121232.

The previous prime is 122011210091. The next prime is 122011210151. The reversal of 122011210121 is 121012110221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (122011210091) and next prime (122011210151).

It can be written as a sum of positive squares in 2 ways, for example, as 79467610000 + 42543600121 = 281900^2 + 206261^2 .

It is a cyclic number.

It is not a de Polignac number, because 122011210121 - 2²² = 122007015817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122011210096 and 122011210105.

It is not an unprimeable number, because it can be changed into a prime (122011210151) 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, 76543250 + ... + 76544843.

It is an arithmetic number, because the mean of its divisors is an integer number (30541074753).

Almost surely, 2^122011210121 is an apocalyptic number.

It is an amenable number.

122011210121 is a deficient number, since it is larger than the sum of its proper divisors (153088891).

122011210121 is an equidigital number, since it uses as much as digits as its factorization.

122011210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153088890.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 122011210121 its reverse (121012110221), we get a palindrome (243023320342).

The spelling of 122011210121 in words is "one hundred twenty-two billion, eleven million, two hundred ten thousand, one hundred twenty-one".