1210020002021 has 16 divisors (see below), whose sum is σ = 1281784424448. Its totient is φ = 1140458281200.

The previous prime is 1210020002011. The next prime is 1210020002041. The reversal of 1210020002021 is 1202000200121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1210020002021 - 2¹⁴ = 1210019985637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210020001993 and 1210020002011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210020002011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845435 + ... + 1770536.

It is an arithmetic number, because the mean of its divisors is an integer number (80111526528).

Almost surely, 2^{1210020002021} is an apocalyptic number.

It is an amenable number.

1210020002021 is a deficient number, since it is larger than the sum of its proper divisors (71764422427).

1210020002021 is a wasteful number, since it uses less digits than its factorization.

1210020002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616392.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1210020002021 its reverse (1202000200121), we get a palindrome (2412020202142).

The spelling of 1210020002021 in words is "one trillion, two hundred ten billion, twenty million, two thousand, twenty-one".