211121020101204 has 72 divisors (see below), whose sum is σ = 537705190425312. Its totient is φ = 69842612854080.

The previous prime is 211121020101203. The next prime is 211121020101259. The reversal of 211121020101204 is 402101020121112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121020101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26599042 + ... + 33611769.

It is an arithmetic number, because the mean of its divisors is an integer number (7468127644796).

Almost surely, 2^{211121020101204} is an apocalyptic number.

It is an amenable number.

211121020101204 is an abundant number, since it is smaller than the sum of its proper divisors (326584170324108).

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

211121020101204 is a wasteful number, since it uses less digits than its factorization.

211121020101204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60211557 (or 60211552 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211121020101204 its reverse (402101020121112), we get a palindrome (613222040222316).

The spelling of 211121020101204 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty million, one hundred one thousand, two hundred four".