20011220401442 has 4 divisors (see below), whose sum is σ = 30016830602166. Its totient is φ = 10005610200720.

The previous prime is 20011220401427. The next prime is 20011220401453. The reversal of 20011220401442 is 24410402211002.

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., 12220261071001 + 7790959330441 = 3495749^2 + 2791229^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002805100359 + ... + 5002805100362.

Almost surely, 2^{20011220401442} is an apocalyptic number.

20011220401442 is a deficient number, since it is larger than the sum of its proper divisors (10005610200724).

20011220401442 is a wasteful number, since it uses less digits than its factorization.

20011220401442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005610200723.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 20011220401442 its reverse (24410402211002), we get a palindrome (44421622612444).

The spelling of 20011220401442 in words is "twenty trillion, eleven billion, two hundred twenty million, four hundred one thousand, four hundred forty-two".