2021221010122 has 16 divisors (see below), whose sum is σ = 3116372502600. Its totient is φ = 982767665152.

The previous prime is 2021221010111. The next prime is 2021221010147. The reversal of 2021221010122 is 2210101221202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1075657305321 + 945563704801 = 1037139^2 + 972401^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021221010096 and 2021221010105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 84360247 + ... + 84384202.

Almost surely, 2^{2021221010122} is an apocalyptic number.

2021221010122 is a deficient number, since it is larger than the sum of its proper divisors (1095151492478).

2021221010122 is a wasteful number, since it uses less digits than its factorization.

2021221010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168744617.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2021221010122 its reverse (2210101221202), we get a palindrome (4231322231324).

The spelling of 2021221010122 in words is "two trillion, twenty-one billion, two hundred twenty-one million, ten thousand, one hundred twenty-two".