101553122221543 has 4 divisors (see below), whose sum is σ = 101825382603208. Its totient is φ = 101280861839880.

The previous prime is 101553122221519. The next prime is 101553122221567. The reversal of 101553122221543 is 345122221355101.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (101553122221519) and next prime (101553122221567).

It is a cyclic number.

It is not a de Polignac number, because 101553122221543 - 2¹⁷ = 101553122090471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101553122221043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136130190273 + ... + 136130191018.

It is an arithmetic number, because the mean of its divisors is an integer number (25456345650802).

Almost surely, 2^{101553122221543} is an apocalyptic number.

101553122221543 is a deficient number, since it is larger than the sum of its proper divisors (272260381665).

101553122221543 is an equidigital number, since it uses as much as digits as its factorization.

101553122221543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272260381664.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 101553122221543 its reverse (345122221355101), we get a palindrome (446675343576644).

The spelling of 101553122221543 in words is "one hundred one trillion, five hundred fifty-three billion, one hundred twenty-two million, two hundred twenty-one thousand, five hundred forty-three".