122021111121210 has 192 divisors, whose sum is σ = 363072573407232. Its totient is φ = 27852446014848.

The previous prime is 122021111121191. The next prime is 122021111121233. The reversal of 122021111121210 is 12121111120221.

It is a happy number.

122021111121210 is a `hidden beast` number, since 1 + 220 + 2 + 1 + 111 + 121 + 210 = 666.

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

It is a Curzon 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, 1390240747 + ... + 1390328513.

It is an arithmetic number, because the mean of its divisors is an integer number (1891002986496).

Almost surely, 2^{122021111121210} is an apocalyptic number.

122021111121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 122021111121210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181536286703616).

122021111121210 is an abundant number, since it is smaller than the sum of its proper divisors (241051462286022).

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

122021111121210 is a wasteful number, since it uses less digits than its factorization.

122021111121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90777 (or 90774 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 122021111121210 its reverse (12121111120221), we get a palindrome (134142222241431).

The spelling of 122021111121210 in words is "one hundred twenty-two trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, two hundred ten".