2211212200021 has 16 divisors (see below), whose sum is σ = 2431472702400. Its totient is φ = 1994181033600.

The previous prime is 2211212200007. The next prime is 2211212200061. The reversal of 2211212200021 is 1200022121122.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211212200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211212199968 and 2211212200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211212200061) 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, 1409911 + ... + 2531851.

It is an arithmetic number, because the mean of its divisors is an integer number (151967043900).

Almost surely, 2^{2211212200021} is an apocalyptic number.

It is an amenable number.

2211212200021 is a deficient number, since it is larger than the sum of its proper divisors (220260502379).

2211212200021 is a wasteful number, since it uses less digits than its factorization.

2211212200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123380.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2211212200021 its reverse (1200022121122), we get a palindrome (3411234321143).

The spelling of 2211212200021 in words is "two trillion, two hundred eleven billion, two hundred twelve million, two hundred thousand, twenty-one".