20210212116 has 18 divisors (see below), whose sum is σ = 51086925162. Its totient is φ = 6736737360.

The previous prime is 20210212097. The next prime is 20210212117. The reversal of 20210212116 is 61121201202.

It can be written as a sum of positive squares in only one way, i.e., 19433475216 + 776736900 = 139404^2 + 27870^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210212117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 280697355 + ... + 280697426.

It is an arithmetic number, because the mean of its divisors is an integer number (2838162509).

Almost surely, 2^20210212116 is an apocalyptic number.

It is an amenable number.

20210212116 is an abundant number, since it is smaller than the sum of its proper divisors (30876713046).

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

20210212116 is a wasteful number, since it uses less digits than its factorization.

20210212116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561394791 (or 561394786 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20210212116 its reverse (61121201202), we get a palindrome (81331413318).

The spelling of 20210212116 in words is "twenty billion, two hundred ten million, two hundred twelve thousand, one hundred sixteen".