20013121022 has 4 divisors (see below), whose sum is σ = 30019681536. Its totient is φ = 10006560510.

The previous prime is 20013121003. The next prime is 20013121027. The reversal of 20013121022 is 22012131002.

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 = 20013120988 and 20013121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003280254 + ... + 5003280257.

It is an arithmetic number, because the mean of its divisors is an integer number (7504920384).

Almost surely, 2^20013121022 is an apocalyptic number.

20013121022 is a deficient number, since it is larger than the sum of its proper divisors (10006560514).

20013121022 is a wasteful number, since it uses less digits than its factorization.

20013121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006560513.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20013121022 its reverse (22012131002), we get a palindrome (42025252024).

The spelling of 20013121022 in words is "twenty billion, thirteen million, one hundred twenty-one thousand, twenty-two".