212021022121002 has 64 divisors (see below), whose sum is σ = 475909289349120. Its totient is φ = 69961209192000.

The previous prime is 212021022120979. The next prime is 212021022121037. The reversal of 212021022121002 is 200121220120212.

It is a happy number.

212021022121002 is a `hidden beast` number, since 2 + 1 + 20 + 210 + 221 + 210 + 0 + 2 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26481252 + ... + 33545472.

It is an arithmetic number, because the mean of its divisors is an integer number (7436082646080).

Almost surely, 2^{212021022121002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021022121002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237954644674560).

212021022121002 is an abundant number, since it is smaller than the sum of its proper divisors (263888267228118).

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

212021022121002 is a wasteful number, since it uses less digits than its factorization.

212021022121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7069836 (or 7069830 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212021022121002 its reverse (200121220120212), we get a palindrome (412142242241214).

The spelling of 212021022121002 in words is "two hundred twelve trillion, twenty-one billion, twenty-two million, one hundred twenty-one thousand, two".