121505353100 has 18 divisors (see below), whose sum is σ = 263666616444. Its totient is φ = 48602141200.

The previous prime is 121505353091. The next prime is 121505353117. The reversal of 121505353100 is 1353505121.

It is a happy number.

It is a super-2 number, since 2×121505353100² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121505353100.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 607526666 + ... + 607526865.

It is an arithmetic number, because the mean of its divisors is an integer number (14648145358).

Almost surely, 2^121505353100 is an apocalyptic number.

121505353100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121505353100 is an abundant number, since it is smaller than the sum of its proper divisors (142161263344).

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

121505353100 is a wasteful number, since it uses less digits than its factorization.

121505353100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215053545 (or 1215053538 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 121505353100 its reverse (1353505121), we get a palindrome (122858858221).

The spelling of 121505353100 in words is "one hundred twenty-one billion, five hundred five million, three hundred fifty-three thousand, one hundred".