20212011242 has 4 divisors (see below), whose sum is σ = 30318016866. Its totient is φ = 10106005620.

The previous prime is 20212011233. The next prime is 20212011269. The reversal of 20212011242 is 24211021202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24211021202 = 2 ⋅12105510601.

It can be written as a sum of positive squares in only one way, i.e., 18157293001 + 2054718241 = 134749^2 + 45329^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20212011242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053002809 + ... + 5053002812.

Almost surely, 2^20212011242 is an apocalyptic number.

20212011242 is a deficient number, since it is larger than the sum of its proper divisors (10106005624).

20212011242 is a wasteful number, since it uses less digits than its factorization.

20212011242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106005623.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212011242 its reverse (24211021202), we get a palindrome (44423032444).

The spelling of 20212011242 in words is "twenty billion, two hundred twelve million, eleven thousand, two hundred forty-two".