211221121002 has 16 divisors (see below), whose sum is σ = 433859600352. Its totient is φ = 68504147280.

The previous prime is 211221120997. The next prime is 211221121009. The reversal of 211221121002 is 200121122112.

211221121002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211221121002² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221121009) 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, 475723024 + ... + 475723467.

It is an arithmetic number, because the mean of its divisors is an integer number (27116225022).

Almost surely, 2^211221121002 is an apocalyptic number.

211221121002 is an abundant number, since it is smaller than the sum of its proper divisors (222638479350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221121002 is a wasteful number, since it uses less digits than its factorization.

211221121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951446533.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211221121002 its reverse (200121122112), we get a palindrome (411342243114).

The spelling of 211221121002 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, two".