1210111002021 has 64 divisors (see below), whose sum is σ = 1725391134720. Its totient is φ = 752708436480.

The previous prime is 1210111001999. The next prime is 1210111002103. The reversal of 1210111002021 is 1202001110121.

It is not a de Polignac number, because 1210111002021 - 2¹⁰ = 1210111000997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1210111001988 and 1210111002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210111002721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 611475010 + ... + 611476988.

It is an arithmetic number, because the mean of its divisors is an integer number (26959236480).

Almost surely, 2^{1210111002021} is an apocalyptic number.

It is an amenable number.

1210111002021 is a deficient number, since it is larger than the sum of its proper divisors (515280132699).

1210111002021 is a wasteful number, since it uses less digits than its factorization.

1210111002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210111002021 its reverse (1202001110121), we get a palindrome (2412112112142).

The spelling of 1210111002021 in words is "one trillion, two hundred ten billion, one hundred eleven million, two thousand, twenty-one".