21213141044 has 24 divisors (see below), whose sum is σ = 38050242048. Its totient is φ = 10341940160.

The previous prime is 21213141041. The next prime is 21213141049. The reversal of 21213141044 is 44014131212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213141041) 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, 256877 + ... + 329259.

It is an arithmetic number, because the mean of its divisors is an integer number (1585426752).

Almost surely, 2^21213141044 is an apocalyptic number.

It is an amenable number.

21213141044 is a deficient number, since it is larger than the sum of its proper divisors (16837101004).

21213141044 is a wasteful number, since it uses less digits than its factorization.

21213141044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74215 (or 74213 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21213141044 its reverse (44014131212), we get a palindrome (65227272256).

The spelling of 21213141044 in words is "twenty-one billion, two hundred thirteen million, one hundred forty-one thousand, forty-four".