122012021101221 has 12 divisors (see below), whose sum is σ = 176277924051372. Its totient is φ = 81323652931776.

The previous prime is 122012021101129. The next prime is 122012021101241. The reversal of 122012021101221 is 122101120210221.

122012021101221 is a `hidden beast` number, since 1 + 220 + 12 + 0 + 211 + 0 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7305479208225 + 114706541892996 = 2702865^2 + 10710114^2 .

It is not a de Polignac number, because 122012021101221 - 2¹¹ = 122012021099173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122012021101194 and 122012021101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122012021101241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1474495416 + ... + 1474578161.

It is an arithmetic number, because the mean of its divisors is an integer number (14689827004281).

Almost surely, 2^{122012021101221} is an apocalyptic number.

It is an amenable number.

122012021101221 is a deficient number, since it is larger than the sum of its proper divisors (54265902950151).

122012021101221 is a wasteful number, since it uses less digits than its factorization.

122012021101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949078180 (or 2949078177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 122012021101221 its reverse (122101120210221), we get a palindrome (244113141311442).

The spelling of 122012021101221 in words is "one hundred twenty-two trillion, twelve billion, twenty-one million, one hundred one thousand, two hundred twenty-one".