21121431330422 has 4 divisors (see below), whose sum is σ = 31682146995636. Its totient is φ = 10560715665210.

The previous prime is 21121431330371. The next prime is 21121431330443. The reversal of 21121431330422 is 22403313412112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21121431330422² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280357832604 + ... + 5280357832607.

It is an arithmetic number, because the mean of its divisors is an integer number (7920536748909).

Almost surely, 2^{21121431330422} is an apocalyptic number.

21121431330422 is a deficient number, since it is larger than the sum of its proper divisors (10560715665214).

21121431330422 is a wasteful number, since it uses less digits than its factorization.

21121431330422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560715665213.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 21121431330422 its reverse (22403313412112), we get a palindrome (43524744742534).

The spelling of 21121431330422 in words is "twenty-one trillion, one hundred twenty-one billion, four hundred thirty-one million, three hundred thirty thousand, four hundred twenty-two".