20011121220012 has 192 divisors, whose sum is σ = 51499623512064. Its totient is φ = 6009226030080.

The previous prime is 20011121219993. The next prime is 20011121220053. The reversal of 20011121220012 is 21002212111002.

It is a junction number, because it is equal to n+sod(n) for n = 20011121219973 and 20011121220000.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5538642318 + ... + 5538645930.

It is an arithmetic number, because the mean of its divisors is an integer number (268227205792).

Almost surely, 2^{20011121220012} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20011121220012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25749811756032).

20011121220012 is an abundant number, since it is smaller than the sum of its proper divisors (31488502292052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011121220012 is a wasteful number, since it uses less digits than its factorization.

20011121220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608 (or 5606 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20011121220012 its reverse (21002212111002), we get a palindrome (41013333331014).

The spelling of 20011121220012 in words is "twenty trillion, eleven billion, one hundred twenty-one million, two hundred twenty thousand, twelve".