101211220101 has 4 divisors (see below), whose sum is σ = 134948293472. Its totient is φ = 67474146732.

The previous prime is 101211220087. The next prime is 101211220133. The reversal of 101211220101 is 101022112101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101022112101 = 3 ⋅33674037367.

It is not a de Polignac number, because 101211220101 - 2¹⁰ = 101211219077 is a prime.

It is a super-2 number, since 2×101211220101² (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 (101211220301) 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, 16868536681 + ... + 16868536686.

It is an arithmetic number, because the mean of its divisors is an integer number (33737073368).

Almost surely, 2^101211220101 is an apocalyptic number.

It is an amenable number.

101211220101 is a deficient number, since it is larger than the sum of its proper divisors (33737073371).

101211220101 is an equidigital number, since it uses as much as digits as its factorization.

101211220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33737073370.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101211220101 its reverse (101022112101), we get a palindrome (202233332202).

The spelling of 101211220101 in words is "one hundred one billion, two hundred eleven million, two hundred twenty thousand, one hundred one".