121132213223220 has 144 divisors (see below), whose sum is σ = 369106802588160. Its totient is φ = 32155174080000.

The previous prime is 121132213223209. The next prime is 121132213223261. The reversal of 121132213223220 is 22322312231121.

121132213223220 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 3 + 2 + 213 + 223 + 220 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40600336 + ... + 43481624.

It is an arithmetic number, because the mean of its divisors is an integer number (2563241684640).

Almost surely, 2^{121132213223220} is an apocalyptic number.

121132213223220 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 121132213223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184553401294080).

121132213223220 is an abundant number, since it is smaller than the sum of its proper divisors (247974589364940).

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

121132213223220 is a wasteful number, since it uses less digits than its factorization.

121132213223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882366 (or 2882361 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 121132213223220 its reverse (22322312231121), we get a palindrome (143454525454341).

The spelling of 121132213223220 in words is "one hundred twenty-one trillion, one hundred thirty-two billion, two hundred thirteen million, two hundred twenty-three thousand, two hundred twenty".