20221212121110 has 576 divisors, whose sum is σ = 74328642722880. Its totient is φ = 3744846120960.

The previous prime is 20221212121109. The next prime is 20221212121111. The reversal of 20221212121110 is 1112121212202.

20221212121110 is a `hidden beast` number, since 2 + 0 + 221 + 212 + 121 + 110 = 666.

It is an interprime number because it is at equal distance from previous prime (20221212121109) and next prime (20221212121111).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221212121111) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 17735424 + ... + 18841116.

It is an arithmetic number, because the mean of its divisors is an integer number (129042782505).

Almost surely, 2^{20221212121110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20221212121110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37164321361440).

20221212121110 is an abundant number, since it is smaller than the sum of its proper divisors (54107430601770).

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

20221212121110 is a wasteful number, since it uses less digits than its factorization.

20221212121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105773 (or 1105763 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20221212121110 its reverse (1112121212202), we get a palindrome (21333333333312).

The spelling of 20221212121110 in words is "twenty trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, one hundred ten".