20121420351433 has 16 divisors (see below), whose sum is σ = 21353779249920. Its totient is φ = 18894524887296.

The previous prime is 20121420351301. The next prime is 20121420351463. The reversal of 20121420351433 is 33415302412102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121420351433 is a prime.

It is a super-2 number, since 2×20121420351433² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121420351395 and 20121420351404.

It is not an unprimeable number, because it can be changed into a prime (20121420351463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12916210 + ... + 14389972.

It is an arithmetic number, because the mean of its divisors is an integer number (1334611203120).

Almost surely, 2^{20121420351433} is an apocalyptic number.

It is an amenable number.

20121420351433 is a deficient number, since it is larger than the sum of its proper divisors (1232358898487).

20121420351433 is a wasteful number, since it uses less digits than its factorization.

20121420351433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475616.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 20121420351433 its reverse (33415302412102), we get a palindrome (53536722763535).

The spelling of 20121420351433 in words is "twenty trillion, one hundred twenty-one billion, four hundred twenty million, three hundred fifty-one thousand, four hundred thirty-three".