155121321011435 has 8 divisors (see below), whose sum is σ = 186163094974176. Its totient is φ = 124085383635520.

The previous prime is 155121321011357. The next prime is 155121321011471. The reversal of 155121321011435 is 534110123121551.

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

It is not a de Polignac number, because 155121321011435 - 2¹⁴ = 155121320995051 is a prime.

It is a super-2 number, since 2×155121321011435² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155121321011395 and 155121321011404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1459088234 + ... + 1459194543.

It is an arithmetic number, because the mean of its divisors is an integer number (23270386871772).

Almost surely, 2^{155121321011435} is an apocalyptic number.

155121321011435 is a deficient number, since it is larger than the sum of its proper divisors (31041773962741).

155121321011435 is a wasteful number, since it uses less digits than its factorization.

155121321011435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918293413.

The product of its (nonzero) digits is 18000, while the sum is 35.

Adding to 155121321011435 its reverse (534110123121551), we get a palindrome (689231444132986).

The spelling of 155121321011435 in words is "one hundred fifty-five trillion, one hundred twenty-one billion, three hundred twenty-one million, eleven thousand, four hundred thirty-five".