121551020435 has 64 divisors (see below), whose sum is σ = 162734673024. Its totient is φ = 86585241600.

The previous prime is 121551020417. The next prime is 121551020443. The reversal of 121551020435 is 534020155121.

It is not a de Polignac number, because 121551020435 - 2¹⁴ = 121551004051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121551020398 and 121551020407.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138598217 + ... + 138599093.

It is an arithmetic number, because the mean of its divisors is an integer number (2542729266).

Almost surely, 2^121551020435 is an apocalyptic number.

121551020435 is a deficient number, since it is larger than the sum of its proper divisors (41183652589).

121551020435 is a wasteful number, since it uses less digits than its factorization.

121551020435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 121551020435 its reverse (534020155121), we get a palindrome (655571175556).

The spelling of 121551020435 in words is "one hundred twenty-one billion, five hundred fifty-one million, twenty thousand, four hundred thirty-five".