21261412261433 has 8 divisors (see below), whose sum is σ = 21352809748608. Its totient is φ = 21170016029344.

The previous prime is 21261412261403. The next prime is 21261412261493. The reversal of 21261412261433 is 33416221416212.

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

It is a cyclic number.

It is not a de Polignac number, because 21261412261433 - 2¹⁰ = 21261412260409 is a prime.

It is a super-2 number, since 2×21261412261433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21261412261403) 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, 53209916 + ... + 53608002.

It is an arithmetic number, because the mean of its divisors is an integer number (2669101218576).

Almost surely, 2^{21261412261433} is an apocalyptic number.

It is an amenable number.

21261412261433 is a deficient number, since it is larger than the sum of its proper divisors (91397487175).

21261412261433 is a wasteful number, since it uses less digits than its factorization.

21261412261433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627543.

The product of its digits is 82944, while the sum is 38.

Adding to 21261412261433 its reverse (33416221416212), we get a palindrome (54677633677645).

The spelling of 21261412261433 in words is "twenty-one trillion, two hundred sixty-one billion, four hundred twelve million, two hundred sixty-one thousand, four hundred thirty-three".