2021121010010 has 16 divisors (see below), whose sum is σ = 3638038737096. Its totient is φ = 808443755328.

The previous prime is 2021121009989. The next prime is 2021121010049. The reversal of 2021121010010 is 100101211202.

It can be written as a sum of positive squares in 4 ways, for example, as 843702872089 + 1177418137921 = 918533^2 + 1085089^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021121009973 and 2021121010000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654544 + ... + 2603796.

Almost surely, 2^{2021121010010} is an apocalyptic number.

2021121010010 is a deficient number, since it is larger than the sum of its proper divisors (1616917727086).

2021121010010 is a wasteful number, since it uses less digits than its factorization.

2021121010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162177.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2021121010010 its reverse (100101211202), we get a palindrome (2121222221212).

The spelling of 2021121010010 in words is "two trillion, twenty-one billion, one hundred twenty-one million, ten thousand, ten".