20212121210112 has 144 divisors (see below), whose sum is σ = 64368552252480. Its totient is φ = 6219114190848.

The previous prime is 20212121210107. The next prime is 20212121210131. The reversal of 20212121210112 is 21101212121202.

20212121210112 is a `hidden beast` number, since 202 + 121 + 21 + 210 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112379658 + ... + 112559369.

Almost surely, 2^{20212121210112} is an apocalyptic number.

It is an amenable number.

20212121210112 is an abundant number, since it is smaller than the sum of its proper divisors (44156431042368).

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

20212121210112 is a wasteful number, since it uses less digits than its factorization.

20212121210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224939065 (or 224939045 counting only the distinct ones).

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

Adding to 20212121210112 its reverse (21101212121202), we get a palindrome (41313333331314).

The spelling of 20212121210112 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred ten thousand, one hundred twelve".