121012210112220 has 240 divisors, whose sum is σ = 434756946032640. Its totient is φ = 27602187336576.

The previous prime is 121012210112201. The next prime is 121012210112239. The reversal of 121012210112220 is 22211012210121.

121012210112220 is a `hidden beast` number, since 1 + 210 + 1 + 221 + 0 + 1 + 12 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (121012210112201) and next prime (121012210112239).

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 = 121012210112193 and 121012210112202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5707254 + ... + 16570973.

It is an arithmetic number, because the mean of its divisors is an integer number (1811487275136).

Almost surely, 2^{121012210112220} is an apocalyptic number.

121012210112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012210112220 is an abundant number, since it is smaller than the sum of its proper divisors (313744735920420).

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

121012210112220 is a wasteful number, since it uses less digits than its factorization.

121012210112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22278734 (or 22278723 counting only the distinct ones).

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

Adding to 121012210112220 its reverse (22211012210121), we get a palindrome (143223222322341).

The spelling of 121012210112220 in words is "one hundred twenty-one trillion, twelve billion, two hundred ten million, one hundred twelve thousand, two hundred twenty".