211230121010100 has 72 divisors (see below), whose sum is σ = 611200117251360. Its totient is φ = 56324256497280.

The previous prime is 211230121010093. The next prime is 211230121010197. The reversal of 211230121010100 is 1010121032112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211230121010100.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 19114215 + ... + 28068014.

It is an arithmetic number, because the mean of its divisors is an integer number (8488890517380).

Almost surely, 2^{211230121010100} is an apocalyptic number.

211230121010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211230121010100 is an abundant number, since it is smaller than the sum of its proper divisors (399969996241260).

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

211230121010100 is a wasteful number, since it uses less digits than its factorization.

211230121010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47197169 (or 47197162 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 211230121010100 its reverse (1010121032112), we get a palindrome (212240242042212).

The spelling of 211230121010100 in words is "two hundred eleven trillion, two hundred thirty billion, one hundred twenty-one million, ten thousand, one hundred".