101000120111221 has 4 divisors (see below), whose sum is σ = 101001450343744. Its totient is φ = 100998789878700.

The previous prime is 101000120111207. The next prime is 101000120111239. The reversal of 101000120111221 is 122111021000101.

It is a happy number.

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 101000120111221 - 2¹⁵ = 101000120078453 is a prime.

It is a super-2 number, since 2×101000120111221² (a number of 29 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 (101000120111521) 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, 665002365 + ... + 665154226.

It is an arithmetic number, because the mean of its divisors is an integer number (25250362585936).

Almost surely, 2^{101000120111221} is an apocalyptic number.

It is an amenable number.

101000120111221 is a deficient number, since it is larger than the sum of its proper divisors (1330232523).

101000120111221 is an equidigital number, since it uses as much as digits as its factorization.

101000120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330232522.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101000120111221 its reverse (122111021000101), we get a palindrome (223111141111322).

The spelling of 101000120111221 in words is "one hundred one trillion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".