2101221021012 has 48 divisors (see below), whose sum is σ = 4909989353472. Its totient is φ = 699387562720.

The previous prime is 2101221020971. The next prime is 2101221021013. The reversal of 2101221021012 is 2101201221012.

It is a junction number, because it is equal to n+sod(n) for n = 2101221020982 and 2101221021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101221021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29408443 + ... + 29479805.

It is an arithmetic number, because the mean of its divisors is an integer number (102291444864).

Almost surely, 2^{2101221021012} is an apocalyptic number.

It is an amenable number.

2101221021012 is an abundant number, since it is smaller than the sum of its proper divisors (2808768332460).

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

2101221021012 is a wasteful number, since it uses less digits than its factorization.

2101221021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74908 (or 74906 counting only the distinct ones).

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

Adding to 2101221021012 its reverse (2101201221012), we get a palindrome (4202422242024).

The spelling of 2101221021012 in words is "two trillion, one hundred one billion, two hundred twenty-one million, twenty-one thousand, twelve".