2211421021 has 8 divisors (see below), whose sum is σ = 2233871744. Its totient is φ = 2188989360.

The previous prime is 2211420989. The next prime is 2211421031. The reversal of 2211421021 is 1201241122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2211421021 - 2⁵ = 2211420989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211420986 and 2211421004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211421031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393451 + ... + 399031.

It is an arithmetic number, because the mean of its divisors is an integer number (279233968).

Almost surely, 2^2211421021 is an apocalyptic number.

It is an amenable number.

2211421021 is a deficient number, since it is larger than the sum of its proper divisors (22450723).

2211421021 is a wasteful number, since it uses less digits than its factorization.

2211421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9531.

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

The square root of 2211421021 is about 47025.7484895243. The cubic root of 2211421021 is about 1302.8381819641.

Adding to 2211421021 its reverse (1201241122), we get a palindrome (3412662143).

The spelling of 2211421021 in words is "two billion, two hundred eleven million, four hundred twenty-one thousand, twenty-one".