101220113451 has 4 divisors (see below), whose sum is σ = 134960151272. Its totient is φ = 67480075632.

The previous prime is 101220113369. The next prime is 101220113479. The reversal of 101220113451 is 154311022101.

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

It is not a de Polignac number, because 101220113451 - 2¹¹ = 101220111403 is a prime.

It is a super-2 number, since 2×101220113451² (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 (101220113651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16870018906 + ... + 16870018911.

It is an arithmetic number, because the mean of its divisors is an integer number (33740037818).

Almost surely, 2^101220113451 is an apocalyptic number.

101220113451 is a deficient number, since it is larger than the sum of its proper divisors (33740037821).

101220113451 is an equidigital number, since it uses as much as digits as its factorization.

101220113451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33740037820.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 101220113451 its reverse (154311022101), we get a palindrome (255531135552).

The spelling of 101220113451 in words is "one hundred one billion, two hundred twenty million, one hundred thirteen thousand, four hundred fifty-one".