10121221121211 has 48 divisors (see below), whose sum is σ = 15109748720352. Its totient is φ = 6524400960000.

The previous prime is 10121221121191. The next prime is 10121221121239. The reversal of 10121221121211 is 11212112212101.

It is a happy number.

10121221121211 is a `hidden beast` number, since 10 + 1 + 212 + 211 + 21 + 211 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-10121221121211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10121221121251) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 386987311 + ... + 387013463.

It is an arithmetic number, because the mean of its divisors is an integer number (314786431674).

Almost surely, 2^{10121221121211} is an apocalyptic number.

10121221121211 is a deficient number, since it is larger than the sum of its proper divisors (4988527599141).

10121221121211 is a wasteful number, since it uses less digits than its factorization.

10121221121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36204 (or 36201 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 10121221121211 its reverse (11212112212101), we get a palindrome (21333333333312).

The spelling of 10121221121211 in words is "ten trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".