101221301123 has 4 divisors (see below), whose sum is σ = 101264358048. Its totient is φ = 101178244200.

The previous prime is 101221301101. The next prime is 101221301141. The reversal of 101221301123 is 321103122101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321103122101 = 131 ⋅2451168871.

It is a cyclic number.

It is not a de Polignac number, because 101221301123 - 2⁸ = 101221300867 is a prime.

It is a super-2 number, since 2×101221301123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221304123) 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, 21524936 + ... + 21529637.

It is an arithmetic number, because the mean of its divisors is an integer number (25316089512).

Almost surely, 2^101221301123 is an apocalyptic number.

101221301123 is a deficient number, since it is larger than the sum of its proper divisors (43056925).

101221301123 is an equidigital number, since it uses as much as digits as its factorization.

101221301123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43056924.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 101221301123 its reverse (321103122101), we get a palindrome (422324423224).

The spelling of 101221301123 in words is "one hundred one billion, two hundred twenty-one million, three hundred one thousand, one hundred twenty-three".