211021021111120 has 80 divisors (see below), whose sum is σ = 535962257970048. Its totient is φ = 76629366443520.

The previous prime is 211021021111099. The next prime is 211021021111139. The reversal of 211021021111120 is 21111120120112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 211021021111094 and 211021021111103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164282259 + ... + 165561778.

Almost surely, 2^{211021021111120} is an apocalyptic number.

211021021111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021021111120 is an abundant number, since it is smaller than the sum of its proper divisors (324941236858928).

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

211021021111120 is a wasteful number, since it uses less digits than its factorization.

211021021111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329844788 (or 329844782 counting only the distinct ones).

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

Adding to 211021021111120 its reverse (21111120120112), we get a palindrome (232132141231232).

The spelling of 211021021111120 in words is "two hundred eleven trillion, twenty-one billion, twenty-one million, one hundred eleven thousand, one hundred twenty".