121354510220100 has 216 divisors, whose sum is σ = 382495096212320. Its totient is φ = 32181298237440.

The previous prime is 121354510220017. The next prime is 121354510220113. The reversal of 121354510220100 is 1022015453121.

It is a happy number.

121354510220100 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 5 + 451 + 0 + 2 + 201 + 0 + 0 = 666.

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, 461736927 + ... + 461999673.

Almost surely, 2^{121354510220100} is an apocalyptic number.

121354510220100 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 121354510220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191247548106160).

121354510220100 is an abundant number, since it is smaller than the sum of its proper divisors (261140585992220).

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

121354510220100 is a wasteful number, since it uses less digits than its factorization.

121354510220100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265619 (or 265609 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 121354510220100 its reverse (1022015453121), we get a palindrome (122376525673221).

The spelling of 121354510220100 in words is "one hundred twenty-one trillion, three hundred fifty-four billion, five hundred ten million, two hundred twenty thousand, one hundred".