101220010001 has 4 divisors (see below), whose sum is σ = 110421829104. Its totient is φ = 92018190900.

The previous prime is 101220009991. The next prime is 101220010033. The reversal of 101220010001 is 100010022101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101220010001 - 2⁶ = 101220009937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220030001) 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, 4600909535 + ... + 4600909556.

It is an arithmetic number, because the mean of its divisors is an integer number (27605457276).

Almost surely, 2^101220010001 is an apocalyptic number.

101220010001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101220010001 is a deficient number, since it is larger than the sum of its proper divisors (9201819103).

101220010001 is an equidigital number, since it uses as much as digits as its factorization.

101220010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9201819102.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 101220010001 its reverse (100010022101), we get a palindrome (201230032102).

It can be divided in two parts, 1012200 and 10001, that added together give a palindrome (1022201).

The spelling of 101220010001 in words is "one hundred one billion, two hundred twenty million, ten thousand, one".