1012222032121 has 4 divisors (see below), whose sum is σ = 1012532818932. Its totient is φ = 1011911245312.

The previous prime is 1012222032113. The next prime is 1012222032161. The reversal of 1012222032121 is 1212302222101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 891579735225 + 120642296896 = 944235^2 + 347336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012222032121 - 2³ = 1012222032113 is a prime.

It is a super-2 number, since 2×1012222032121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012222032161) 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 3 ways as a sum of consecutive naturals, for example, 155388520 + ... + 155395033.

It is an arithmetic number, because the mean of its divisors is an integer number (253133204733).

Almost surely, 2^{1012222032121} is an apocalyptic number.

It is an amenable number.

1012222032121 is a deficient number, since it is larger than the sum of its proper divisors (310786811).

1012222032121 is an equidigital number, since it uses as much as digits as its factorization.

1012222032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310786810.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1012222032121 its reverse (1212302222101), we get a palindrome (2224524254222).

The spelling of 1012222032121 in words is "one trillion, twelve billion, two hundred twenty-two million, thirty-two thousand, one hundred twenty-one".