122220212111100 has 216 divisors, whose sum is σ = 400141023085440. Its totient is φ = 31144411520640.

The previous prime is 122220212111083. The next prime is 122220212111117. The reversal of 122220212111100 is 1111212022221.

122220212111100 is a `hidden beast` number, since 1 + 22 + 220 + 212 + 111 + 100 = 666.

It is an interprime number because it is at equal distance from previous prime (122220212111083) and next prime (122220212111117).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18196167 + ... + 23990433.

Almost surely, 2^{122220212111100} is an apocalyptic number.

122220212111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122220212111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200070511542720).

122220212111100 is an abundant number, since it is smaller than the sum of its proper divisors (277920810974340).

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

122220212111100 is a wasteful number, since it uses less digits than its factorization.

122220212111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795329 (or 5795319 counting only the distinct ones).

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

Adding to 122220212111100 its reverse (1111212022221), we get a palindrome (123331424133321).

The spelling of 122220212111100 in words is "one hundred twenty-two trillion, two hundred twenty billion, two hundred twelve million, one hundred eleven thousand, one hundred".