20021320123022 has 4 divisors (see below), whose sum is σ = 30031980184536. Its totient is φ = 10010660061510.

The previous prime is 20021320122967. The next prime is 20021320123031. The reversal of 20021320123022 is 22032102312002.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20021320122985 and 20021320123003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005330030754 + ... + 5005330030757.

It is an arithmetic number, because the mean of its divisors is an integer number (7507995046134).

Almost surely, 2^{20021320123022} is an apocalyptic number.

20021320123022 is a deficient number, since it is larger than the sum of its proper divisors (10010660061514).

20021320123022 is a wasteful number, since it uses less digits than its factorization.

20021320123022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10010660061513.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20021320123022 its reverse (22032102312002), we get a palindrome (42053422435024).

The spelling of 20021320123022 in words is "twenty trillion, twenty-one billion, three hundred twenty million, one hundred twenty-three thousand, twenty-two".