21110412554122 has 4 divisors (see below), whose sum is σ = 31665618831186. Its totient is φ = 10555206277060.

The previous prime is 21110412554059. The next prime is 21110412554137. The reversal of 21110412554122 is 22145521401112.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 20416941657121 + 693470897001 = 4518511^2 + 832749^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277603138529 + ... + 5277603138532.

Almost surely, 2^{21110412554122} is an apocalyptic number.

21110412554122 is a deficient number, since it is larger than the sum of its proper divisors (10555206277064).

21110412554122 is a wasteful number, since it uses less digits than its factorization.

21110412554122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10555206277063.

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 21110412554122 its reverse (22145521401112), we get a palindrome (43255933955234).

The spelling of 21110412554122 in words is "twenty-one trillion, one hundred ten billion, four hundred twelve million, five hundred fifty-four thousand, one hundred twenty-two".