1021221210112 has 24 divisors (see below), whose sum is σ = 2041943781150. Its totient is φ = 510610604032.

The previous prime is 1021221210103. The next prime is 1021221210197. The reversal of 1021221210112 is 2110121221201.

It can be written as a sum of positive squares in only one way, i.e., 686008001536 + 335213208576 = 828256^2 + 578976^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249319537 + ... + 249323632.

Almost surely, 2^{1021221210112} is an apocalyptic number.

It is an amenable number.

1021221210112 is a deficient number, since it is larger than the sum of its proper divisors (1020722571038).

1021221210112 is an frugal number, since it uses more digits than its factorization.

1021221210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498643191 (or 498643171 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1021221210112 its reverse (2110121221201), we get a palindrome (3131342431313).

The spelling of 1021221210112 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred ten thousand, one hundred twelve".