20211212111020 has 48 divisors (see below), whose sum is σ = 51360256664640. Its totient is φ = 6521937352704.

The previous prime is 20211212110993. The next prime is 20211212111021. The reversal of 20211212111020 is 2011121211202.

It is a junction number, because it is equal to n+sod(n) for n = 20211212110985 and 20211212111003.

It is not an unprimeable number, because it can be changed into a prime (20211212111021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4246050585 + ... + 4246055344.

It is an arithmetic number, because the mean of its divisors is an integer number (1070005347180).

Almost surely, 2^{20211212111020} is an apocalyptic number.

20211212111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211212111020 is an abundant number, since it is smaller than the sum of its proper divisors (31149044553620).

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

20211212111020 is a wasteful number, since it uses less digits than its factorization.

20211212111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8492105962 (or 8492105960 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20211212111020 its reverse (2011121211202), we get a palindrome (22222333322222).

The spelling of 20211212111020 in words is "twenty trillion, two hundred eleven billion, two hundred twelve million, one hundred eleven thousand, twenty".