121745521635 has 8 divisors (see below), whose sum is σ = 194792834640. Its totient is φ = 64930944864.

The previous prime is 121745521633. The next prime is 121745521649. The reversal of 121745521635 is 536125547121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121745521635 - 2¹ = 121745521633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121745521633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4058184040 + ... + 4058184069.

It is an arithmetic number, because the mean of its divisors is an integer number (24349104330).

Almost surely, 2^121745521635 is an apocalyptic number.

121745521635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121745521635 is a deficient number, since it is larger than the sum of its proper divisors (73047313005).

121745521635 is an equidigital number, since it uses as much as digits as its factorization.

121745521635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116368117.

The product of its digits is 252000, while the sum is 42.

The spelling of 121745521635 in words is "one hundred twenty-one billion, seven hundred forty-five million, five hundred twenty-one thousand, six hundred thirty-five".