221212010022120 has 192 divisors, whose sum is σ = 776473285835520. Its totient is φ = 54295263954432.

The previous prime is 221212010022109. The next prime is 221212010022131. The reversal of 221212010022120 is 21220010212122.

It is a happy number.

221212010022120 is a `hidden beast` number, since 221 + 2 + 1 + 201 + 0 + 0 + 221 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (221212010022109) and next prime (221212010022131).

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

It is a junction number, because it is equal to n+sod(n) for n = 221212010022093 and 221212010022102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66484864 + ... + 69732783.

It is an arithmetic number, because the mean of its divisors is an integer number (4044131697060).

Almost surely, 2^{221212010022120} is an apocalyptic number.

221212010022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221212010022120 is an abundant number, since it is smaller than the sum of its proper divisors (555261275813400).

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

221212010022120 is a wasteful number, since it uses less digits than its factorization.

221212010022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136218024 (or 136218017 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221212010022120 its reverse (21220010212122), we get a palindrome (242432020234242).

The spelling of 221212010022120 in words is "two hundred twenty-one trillion, two hundred twelve billion, ten million, twenty-two thousand, one hundred twenty".