212220121211120 has 80 divisors (see below), whose sum is σ = 541241251780320. Its totient is φ = 76744594252800.

The previous prime is 212220121211113. The next prime is 212220121211129. The reversal of 212220121211120 is 21112121022212.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×212220121211120² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212220121211092 and 212220121211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220121211129) 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, 666026435 + ... + 666344994.

It is an arithmetic number, because the mean of its divisors is an integer number (6765515647254).

Almost surely, 2^{212220121211120} is an apocalyptic number.

212220121211120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212220121211120 is an abundant number, since it is smaller than the sum of its proper divisors (329021130569200).

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

212220121211120 is a wasteful number, since it uses less digits than its factorization.

212220121211120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332371634 (or 1332371628 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212220121211120 its reverse (21112121022212), we get a palindrome (233332242233332).

The spelling of 212220121211120 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty".