100120001121221 has 2 divisors, whose sum is σ = 100120001121222. Its totient is φ = 100120001121220.

The previous prime is 100120001121209. The next prime is 100120001121233. The reversal of 100120001121221 is 122121100021001.

It is a balanced prime because it is at equal distance from previous prime (100120001121209) and next prime (100120001121233).

It can be written as a sum of positive squares in only one way, i.e., 50162670318721 + 49957330802500 = 7082561^2 + 7068050^2 .

It is a cyclic number.

It is not a de Polignac number, because 100120001121221 - 2¹⁰ = 100120001120197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100120001121196 and 100120001121205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100120001121281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50060000560610 + 50060000560611.

It is an arithmetic number, because the mean of its divisors is an integer number (50060000560611).

Almost surely, 2^{100120001121221} is an apocalyptic number.

It is an amenable number.

100120001121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

100120001121221 is an equidigital number, since it uses as much as digits as its factorization.

100120001121221 is an evil number, because the sum of its binary digits is even.

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

Adding to 100120001121221 its reverse (122121100021001), we get a palindrome (222241101142222).

The spelling of 100120001121221 in words is "one hundred trillion, one hundred twenty billion, one million, one hundred twenty-one thousand, two hundred twenty-one".