11221000020021 has 16 divisors (see below), whose sum is σ = 16321574081088. Its totient is φ = 6800556278400.

The previous prime is 11221000019963. The next prime is 11221000020031. The reversal of 11221000020021 is 12002000012211.

It is not a de Polignac number, because 11221000020021 - 2¹¹ = 11221000017973 is a prime.

It is a super-2 number, since 2×11221000020021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221000019979 and 11221000020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221000020031) 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, 3613345 + ... + 5958041.

It is an arithmetic number, because the mean of its divisors is an integer number (1020098380068).

Almost surely, 2^{11221000020021} is an apocalyptic number.

11221000020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221000020021 is a deficient number, since it is larger than the sum of its proper divisors (5100574061067).

11221000020021 is a wasteful number, since it uses less digits than its factorization.

11221000020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489732.

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

Adding to 11221000020021 its reverse (12002000012211), we get a palindrome (23223000032232).

The spelling of 11221000020021 in words is "eleven trillion, two hundred twenty-one billion, twenty thousand, twenty-one".