1021222121012 has 12 divisors (see below), whose sum is σ = 1787346651300. Its totient is φ = 510551649216.

The previous prime is 1021222121011. The next prime is 1021222121021. The reversal of 1021222121012 is 2101212221201.

It can be written as a sum of positive squares in 2 ways, for example, as 753101138596 + 268120982416 = 867814^2 + 517804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021222121011) 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, 14814137 + ... + 14882912.

It is an arithmetic number, because the mean of its divisors is an integer number (148945554275).

Almost surely, 2^{1021222121012} is an apocalyptic number.

It is an amenable number.

1021222121012 is a deficient number, since it is larger than the sum of its proper divisors (766124530288).

1021222121012 is a wasteful number, since it uses less digits than its factorization.

1021222121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29705650 (or 29705648 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1021222121012 its reverse (2101212221201), we get a palindrome (3122434342213).

The spelling of 1021222121012 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, twelve".