13121220210122 has 4 divisors (see below), whose sum is σ = 19681830315186. Its totient is φ = 6560610105060.

The previous prime is 13121220210121. The next prime is 13121220210151. The reversal of 13121220210122 is 22101202212131.

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

It can be written as a sum of positive squares in only one way, i.e., 12341794321921 + 779425888201 = 3513089^2 + 882851^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13121220210094 and 13121220210103.

It is not an unprimeable number, because it can be changed into a prime (13121220210121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280305052529 + ... + 3280305052532.

Almost surely, 2^{13121220210122} is an apocalyptic number.

13121220210122 is a deficient number, since it is larger than the sum of its proper divisors (6560610105064).

13121220210122 is an equidigital number, since it uses as much as digits as its factorization.

13121220210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560610105063.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 13121220210122 its reverse (22101202212131), we get a palindrome (35222422422253).

The spelling of 13121220210122 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-two".