201021212020212 has 36 divisors (see below), whose sum is σ = 521870383761636. Its totient is φ = 65196068762880.

The previous prime is 201021212020193. The next prime is 201021212020273. The reversal of 201021212020212 is 212020212120102.

It is a happy number.

201021212020212 is a `hidden beast` number, since 201 + 0 + 21 + 212 + 0 + 20 + 212 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137012315711076 + 64008896309136 = 11705226^2 + 8000556^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75458411589 + ... + 75458414252.

Almost surely, 2^{201021212020212} is an apocalyptic number.

It is an amenable number.

201021212020212 is an abundant number, since it is smaller than the sum of its proper divisors (320849171741424).

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

201021212020212 is a wasteful number, since it uses less digits than its factorization.

201021212020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150916825888 (or 150916825883 counting only the distinct ones).

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

Adding to 201021212020212 its reverse (212020212120102), we get a palindrome (413041424140314).

The spelling of 201021212020212 in words is "two hundred one trillion, twenty-one billion, two hundred twelve million, twenty thousand, two hundred twelve".