1012220331121 has 4 divisors (see below), whose sum is σ = 1047124480500. Its totient is φ = 977316181744.

The previous prime is 1012220331107. The next prime is 1012220331163. The reversal of 1012220331121 is 1211330222101.

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 199193508721 + 813026822400 = 446311^2 + 901680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012220331121 - 2¹⁹ = 1012219806833 is a prime.

It is a super-2 number, since 2×1012220331121² (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 (1012220331721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17452074646 + ... + 17452074703.

It is an arithmetic number, because the mean of its divisors is an integer number (261781120125).

Almost surely, 2^{1012220331121} is an apocalyptic number.

It is an amenable number.

1012220331121 is a deficient number, since it is larger than the sum of its proper divisors (34904149379).

1012220331121 is an equidigital number, since it uses as much as digits as its factorization.

1012220331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34904149378.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1012220331121 its reverse (1211330222101), we get a palindrome (2223550553222).

The spelling of 1012220331121 in words is "one trillion, twelve billion, two hundred twenty million, three hundred thirty-one thousand, one hundred twenty-one".