21146553266126 has 4 divisors (see below), whose sum is σ = 31719829899192. Its totient is φ = 10573276633062.

The previous prime is 21146553266077. The next prime is 21146553266141. The reversal of 21146553266126 is 62166235564112.

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

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, 5286638316530 + ... + 5286638316533.

It is an arithmetic number, because the mean of its divisors is an integer number (7929957474798).

Almost surely, 2^{21146553266126} is an apocalyptic number.

21146553266126 is a deficient number, since it is larger than the sum of its proper divisors (10573276633066).

21146553266126 is a wasteful number, since it uses less digits than its factorization.

21146553266126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10573276633065.

The product of its digits is 3110400, while the sum is 50.

The spelling of 21146553266126 in words is "twenty-one trillion, one hundred forty-six billion, five hundred fifty-three million, two hundred sixty-six thousand, one hundred twenty-six".