2021121020210 has 16 divisors (see below), whose sum is σ = 3674037816792. Its totient is φ = 800443968000.

The previous prime is 2021121020197. The next prime is 2021121020239. The reversal of 2021121020210 is 120201211202.

It can be written as a sum of positive squares in 4 ways, for example, as 1999517605849 + 21603414361 = 1414043^2 + 146981^2 .

It is a super-2 number, since 2×2021121020210² (a number of 25 digits) contains 22 as substring.

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, 1000553951 + ... + 1000555970.

Almost surely, 2^{2021121020210} is an apocalyptic number.

2021121020210 is a deficient number, since it is larger than the sum of its proper divisors (1652916796582).

2021121020210 is a wasteful number, since it uses less digits than its factorization.

2021121020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001110029.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021121020210 its reverse (120201211202), we get a palindrome (2141322231412).

The spelling of 2021121020210 in words is "two trillion, twenty-one billion, one hundred twenty-one million, twenty thousand, two hundred ten".