21212041142 has 32 divisors (see below), whose sum is σ = 35742228480. Its totient is φ = 9382262400.

The previous prime is 21212041127. The next prime is 21212041181. The reversal of 21212041142 is 24114021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47234 + ... + 211317.

It is an arithmetic number, because the mean of its divisors is an integer number (1116944640).

Almost surely, 2^21212041142 is an apocalyptic number.

21212041142 is a deficient number, since it is larger than the sum of its proper divisors (14530187338).

21212041142 is a wasteful number, since it uses less digits than its factorization.

21212041142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258716.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212041142 its reverse (24114021212), we get a palindrome (45326062354).

The spelling of 21212041142 in words is "twenty-one billion, two hundred twelve million, forty-one thousand, one hundred forty-two".