20011020122 has 4 divisors (see below), whose sum is σ = 30016530186. Its totient is φ = 10005510060.

The previous prime is 20011020109. The next prime is 20011020137. The reversal of 20011020122 is 22102011002.

It is a happy number.

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., 20007819601 + 3200521 = 141449^2 + 1789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002755029 + ... + 5002755032.

Almost surely, 2^20011020122 is an apocalyptic number.

20011020122 is a deficient number, since it is larger than the sum of its proper divisors (10005510064).

20011020122 is a wasteful number, since it uses less digits than its factorization.

20011020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005510063.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011020122 its reverse (22102011002), we get a palindrome (42113031124).

The spelling of 20011020122 in words is "twenty billion, eleven million, twenty thousand, one hundred twenty-two".