100012222220121 has 48 divisors (see below), whose sum is σ = 152842461408000. Its totient is φ = 65329686864000.

The previous prime is 100012222220111. The next prime is 100012222220179. The reversal of 100012222220121 is 121022222210001.

It is a happy number.

100012222220121 is a `hidden beast` number, since 100 + 0 + 1 + 2 + 222 + 220 + 121 = 666.

It is not a de Polignac number, because 100012222220121 - 2¹⁹ = 100012221695833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100012222220094 and 100012222220103.

It is not an unprimeable number, because it can be changed into a prime (100012222220111) 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, 4502005 + ... + 14842253.

It is an arithmetic number, because the mean of its divisors is an integer number (3184217946000).

Almost surely, 2^{100012222220121} is an apocalyptic number.

It is an amenable number.

100012222220121 is a deficient number, since it is larger than the sum of its proper divisors (52830239187879).

100012222220121 is an equidigital number, since it uses as much as digits as its factorization.

100012222220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341068 (or 10341056 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100012222220121 its reverse (121022222210001), we get a palindrome (221034444430122).

The spelling of 100012222220121 in words is "one hundred trillion, twelve billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".