212102121211020 has 144 divisors (see below), whose sum is σ = 669816563314080. Its totient is φ = 54278039927808.

The previous prime is 212102121211009. The next prime is 212102121211033. The reversal of 212102121211020 is 20112121201212.

212102121211020 is a `hidden beast` number, since 21 + 210 + 212 + 121 + 102 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 212102121210984 and 212102121211002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217645090 + ... + 218617449.

Almost surely, 2^{212102121211020} is an apocalyptic number.

212102121211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102121211020 is an abundant number, since it is smaller than the sum of its proper divisors (457714442103060).

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

212102121211020 is a wasteful number, since it uses less digits than its factorization.

212102121211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436262664 (or 436262659 counting only the distinct ones).

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

Adding to 212102121211020 its reverse (20112121201212), we get a palindrome (232214242412232).

The spelling of 212102121211020 in words is "two hundred twelve trillion, one hundred two billion, one hundred twenty-one million, two hundred eleven thousand, twenty".