21213545150413 has 16 divisors (see below), whose sum is σ = 26456001356160. Its totient is φ = 16525069516800.

The previous prime is 21213545150393. The next prime is 21213545150417. The reversal of 21213545150413 is 31405154531212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213545150413 is a prime.

It is a super-2 number, since 2×21213545150413² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213545150417) 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, 41122548 + ... + 41635213.

It is an arithmetic number, because the mean of its divisors is an integer number (1653500084760).

Almost surely, 2^{21213545150413} is an apocalyptic number.

It is an amenable number.

21213545150413 is a deficient number, since it is larger than the sum of its proper divisors (5242456205747).

21213545150413 is a wasteful number, since it uses less digits than its factorization.

21213545150413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82761108.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 21213545150413 its reverse (31405154531212), we get a palindrome (52618699681625).

The spelling of 21213545150413 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, one hundred fifty thousand, four hundred thirteen".