211111102021002 has 96 divisors (see below), whose sum is σ = 440524093838400. Its totient is φ = 67440944524800.

The previous prime is 211111102020979. The next prime is 211111102021009. The reversal of 211111102021002 is 200120201111112.

It is a happy number.

It is a super-3 number, since 3×211111102021002³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (211111102021009) 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 47 ways as a sum of consecutive naturals, for example, 1090843398 + ... + 1091036910.

It is an arithmetic number, because the mean of its divisors is an integer number (4588792644150).

Almost surely, 2^{211111102021002} is an apocalyptic number.

211111102021002 is an abundant number, since it is smaller than the sum of its proper divisors (229412991817398).

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

211111102021002 is a wasteful number, since it uses less digits than its factorization.

211111102021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195176 (or 195147 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211111102021002 its reverse (200120201111112), we get a palindrome (411231303132114).

The spelling of 211111102021002 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred two million, twenty-one thousand, two".