511225400354121 has 6 divisors (see below), whose sum is σ = 738436689400410. Its totient is φ = 340816933569408.

The previous prime is 511225400354099. The next prime is 511225400354131. The reversal of 511225400354121 is 121453004522115.

511225400354121 is a `hidden beast` number, since 5 + 1 + 1 + 22 + 540 + 0 + 35 + 41 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 484787920410000 + 26437479944121 = 22017900^2 + 5141739^2 .

It is not a de Polignac number, because 511225400354121 - 2²⁶ = 511225333245257 is a prime.

It is a super-2 number, since 2×511225400354121² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (511225400354131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28401411130776 + ... + 28401411130793.

It is an arithmetic number, because the mean of its divisors is an integer number (123072781566735).

Almost surely, 2^{511225400354121} is an apocalyptic number.

It is an amenable number.

511225400354121 is a deficient number, since it is larger than the sum of its proper divisors (227211289046289).

511225400354121 is a wasteful number, since it uses less digits than its factorization.

511225400354121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56802822261575 (or 56802822261572 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

Adding to 511225400354121 its reverse (121453004522115), we get a palindrome (632678404876236).

The spelling of 511225400354121 in words is "five hundred eleven trillion, two hundred twenty-five billion, four hundred million, three hundred fifty-four thousand, one hundred twenty-one".