1210021020021 has 16 divisors (see below), whose sum is σ = 1764674472960. Its totient is φ = 731411115120.

The previous prime is 1210021019993. The next prime is 1210021020023. The reversal of 1210021020021 is 1200201200121.

It is a de Polignac number, because none of the positive numbers 2^k-1210021020021 is a prime.

It is a super-2 number, since 2×1210021020021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210021019979 and 1210021020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210021020023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48361245 + ... + 48386258.

It is an arithmetic number, because the mean of its divisors is an integer number (110292154560).

Almost surely, 2^{1210021020021} is an apocalyptic number.

1210021020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210021020021 is a deficient number, since it is larger than the sum of its proper divisors (554653452939).

1210021020021 is a wasteful number, since it uses less digits than its factorization.

1210021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96747896.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1210021020021 its reverse (1200201200121), we get a palindrome (2410222220142).

The spelling of 1210021020021 in words is "one trillion, two hundred ten billion, twenty-one million, twenty thousand, twenty-one".