20111021121122 has 8 divisors (see below), whose sum is σ = 30169451148636. Its totient is φ = 10054537404912.

The previous prime is 20111021121119. The next prime is 20111021121137. The reversal of 20111021121122 is 22112112011102.

It can be written as a sum of positive squares in 2 ways, for example, as 17956058776681 + 2154962344441 = 4237459^2 + 1467979^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20111021121122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486551993 + ... + 486593324.

Almost surely, 2^{20111021121122} is an apocalyptic number.

20111021121122 is a deficient number, since it is larger than the sum of its proper divisors (10058430027514).

20111021121122 is a wasteful number, since it uses less digits than its factorization.

20111021121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973155652.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20111021121122 its reverse (22112112011102), we get a palindrome (42223133132224).

The spelling of 20111021121122 in words is "twenty trillion, one hundred eleven billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-two".