111212022011220 has 288 divisors, whose sum is σ = 385797474316800. Its totient is φ = 25704953745408.

The previous prime is 111212022011197. The next prime is 111212022011243. The reversal of 111212022011220 is 22110220212111.

111212022011220 is a `hidden beast` number, since 1 + 1 + 1 + 212 + 0 + 220 + 11 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (111212022011197) and next prime (111212022011243).

It is a super-2 number, since 2×111212022011220² (a number of 29 digits) contains 22 as substring.

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 = 111212022011193 and 111212022011202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6044140 + ... + 16092099.

It is an arithmetic number, because the mean of its divisors is an integer number (1339574563600).

Almost surely, 2^{111212022011220} is an apocalyptic number.

111212022011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212022011220 is an abundant number, since it is smaller than the sum of its proper divisors (274585452305580).

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

111212022011220 is a wasteful number, since it uses less digits than its factorization.

111212022011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22136399 (or 22136394 counting only the distinct ones).

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

Adding to 111212022011220 its reverse (22110220212111), we get a palindrome (133322242223331).

The spelling of 111212022011220 in words is "one hundred eleven trillion, two hundred twelve billion, twenty-two million, eleven thousand, two hundred twenty".