20011221110102 has 4 divisors (see below), whose sum is σ = 30016831665156. Its totient is φ = 10005610555050.

The previous prime is 20011221110057. The next prime is 20011221110143. The reversal of 20011221110102 is 20101112211002.

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

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, 5002805277524 + ... + 5002805277527.

It is an arithmetic number, because the mean of its divisors is an integer number (7504207916289).

Almost surely, 2^{20011221110102} is an apocalyptic number.

20011221110102 is a deficient number, since it is larger than the sum of its proper divisors (10005610555054).

20011221110102 is a wasteful number, since it uses less digits than its factorization.

20011221110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005610555053.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20011221110102 its reverse (20101112211002), we get a palindrome (40112333321104).

The spelling of 20011221110102 in words is "twenty trillion, eleven billion, two hundred twenty-one million, one hundred ten thousand, one hundred two".