20211212122 has 8 divisors (see below), whose sum is σ = 30548244672. Its totient is φ = 10028463900.

The previous prime is 20211212101. The next prime is 20211212123. The reversal of 20211212122 is 22121211202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20211212096 and 20211212105.

It is not an unprimeable number, because it can be changed into a prime (20211212123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38570754 + ... + 38571277.

It is an arithmetic number, because the mean of its divisors is an integer number (3818530584).

Almost surely, 2^20211212122 is an apocalyptic number.

20211212122 is a deficient number, since it is larger than the sum of its proper divisors (10337032550).

20211212122 is a wasteful number, since it uses less digits than its factorization.

20211212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77142164.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211212122 its reverse (22121211202), we get a palindrome (42332423324).

The spelling of 20211212122 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty-two".