20211220120110 has 16 divisors (see below), whose sum is σ = 48506928288336. Its totient is φ = 5389658698688.

The previous prime is 20211220120093. The next prime is 20211220120159. The reversal of 20211220120110 is 1102102211202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20211220120110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336853668639 + ... + 336853668698.

It is an arithmetic number, because the mean of its divisors is an integer number (3031683018021).

Almost surely, 2^{20211220120110} is an apocalyptic number.

20211220120110 is an abundant number, since it is smaller than the sum of its proper divisors (28295708168226).

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

20211220120110 is a wasteful number, since it uses less digits than its factorization.

20211220120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673707337347.

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

Adding to 20211220120110 its reverse (1102102211202), we get a palindrome (21313322331312).

The spelling of 20211220120110 in words is "twenty trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty thousand, one hundred ten".