20021201211122 has 4 divisors (see below), whose sum is σ = 30031801816686. Its totient is φ = 10010600605560.

The previous prime is 20021201211103. The next prime is 20021201211133. The reversal of 20021201211122 is 22111210212002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15102169594801 + 4919031616321 = 3886151^2 + 2217889^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20021201211122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005300302779 + ... + 5005300302782.

Almost surely, 2^{20021201211122} is an apocalyptic number.

20021201211122 is a deficient number, since it is larger than the sum of its proper divisors (10010600605564).

20021201211122 is a wasteful number, since it uses less digits than its factorization.

20021201211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010600605563.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021201211122 its reverse (22111210212002), we get a palindrome (42132411423124).

The spelling of 20021201211122 in words is "twenty trillion, twenty-one billion, two hundred one million, two hundred eleven thousand, one hundred twenty-two".