210020121211212 has 144 divisors (see below), whose sum is σ = 571990085022720. Its totient is φ = 64591219324800.

The previous prime is 210020121211169. The next prime is 210020121211213. The reversal of 210020121211212 is 212112121020012.

210020121211212 is a `hidden beast` number, since 2 + 100 + 20 + 121 + 211 + 212 = 666.

210020121211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (210020121211213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10920905637 + ... + 10920924867.

Almost surely, 2^{210020121211212} is an apocalyptic number.

It is an amenable number.

210020121211212 is an abundant number, since it is smaller than the sum of its proper divisors (361969963811508).

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

210020121211212 is a wasteful number, since it uses less digits than its factorization.

210020121211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29004 (or 28999 counting only the distinct ones).

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

Adding to 210020121211212 its reverse (212112121020012), we get a palindrome (422132242231224).

The spelling of 210020121211212 in words is "two hundred ten trillion, twenty billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twelve".