121230112122210 has 256 divisors, whose sum is σ = 361351504733184. Its totient is φ = 25346653028352.

The previous prime is 121230112122209. The next prime is 121230112122281. The reversal of 121230112122210 is 12221211032121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 134963092 + ... + 135858368.

It is an arithmetic number, because the mean of its divisors is an integer number (1411529315364).

Almost surely, 2^{121230112122210} is an apocalyptic number.

121230112122210 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 121230112122210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180675752366592).

121230112122210 is an abundant number, since it is smaller than the sum of its proper divisors (240121392610974).

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

121230112122210 is a wasteful number, since it uses less digits than its factorization.

121230112122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895757.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 121230112122210 its reverse (12221211032121), we get a palindrome (133451323154331).

The spelling of 121230112122210 in words is "one hundred twenty-one trillion, two hundred thirty billion, one hundred twelve million, one hundred twenty-two thousand, two hundred ten".