101221020143 has 4 divisors (see below), whose sum is σ = 101221810128. Its totient is φ = 101220230160.

The previous prime is 101221020127. The next prime is 101221020151. The reversal of 101221020143 is 341020122101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101221020143 - 2⁴ = 101221020127 is a prime.

It is a super-2 number, since 2×101221020143² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221020113) 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, 153638 + ... + 475443.

It is an arithmetic number, because the mean of its divisors is an integer number (25305452532).

Almost surely, 2^101221020143 is an apocalyptic number.

101221020143 is a deficient number, since it is larger than the sum of its proper divisors (789985).

101221020143 is an equidigital number, since it uses as much as digits as its factorization.

101221020143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789984.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 101221020143 its reverse (341020122101), we get a palindrome (442241142244).

The spelling of 101221020143 in words is "one hundred one billion, two hundred twenty-one million, twenty thousand, one hundred forty-three".