1012222220121 has 72 divisors (see below), whose sum is σ = 1710890442144. Its totient is φ = 574991948160.

The previous prime is 1012222220081. The next prime is 1012222220147. The reversal of 1012222220121 is 1210222222101.

It is a happy number.

1012222220121 is a `hidden beast` number, since 101 + 2 + 222 + 220 + 121 = 666.

It is not a de Polignac number, because 1012222220121 - 2¹⁰ = 1012222219097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012222220094 and 1012222220103.

It is not an unprimeable number, because it can be changed into a prime (1012222220021) 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 71 ways as a sum of consecutive naturals, for example, 69166621 + ... + 69181253.

It is an arithmetic number, because the mean of its divisors is an integer number (23762367252).

Almost surely, 2^{1012222220121} is an apocalyptic number.

It is an amenable number.

1012222220121 is a deficient number, since it is larger than the sum of its proper divisors (698668222023).

1012222220121 is a wasteful number, since it uses less digits than its factorization.

1012222220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15571 (or 15561 counting only the distinct ones).

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

Adding to 1012222220121 its reverse (1210222222101), we get a palindrome (2222444442222).

The spelling of 1012222220121 in words is "one trillion, twelve billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".