1021021221012 has 48 divisors (see below), whose sum is σ = 2565731169792. Its totient is φ = 314149587840.

The previous prime is 1021021220963. The next prime is 1021021221029. The reversal of 1021021221012 is 2101221201201.

It is a junction number, because it is equal to n+sod(n) for n = 1021021220982 and 1021021221000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5268253 + ... + 5458619.

It is an arithmetic number, because the mean of its divisors is an integer number (53452732704).

Almost surely, 2^{1021021221012} is an apocalyptic number.

1021021221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021021221012 is an abundant number, since it is smaller than the sum of its proper divisors (1544709948780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021021221012 is a wasteful number, since it uses less digits than its factorization.

1021021221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224768 (or 224766 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021021221012 its reverse (2101221201201), we get a palindrome (3122242422213).

The spelling of 1021021221012 in words is "one trillion, twenty-one billion, twenty-one million, two hundred twenty-one thousand, twelve".