221002121101 has 4 divisors (see below), whose sum is σ = 224114827104. Its totient is φ = 217889415100.

The previous prime is 221002121071. The next prime is 221002121129. The reversal of 221002121101 is 101121200122.

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 221002121101 - 2⁵ = 221002121069 is a prime.

It is a super-2 number, since 2×221002121101² (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 (221002131101) 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, 1556352895 + ... + 1556353036.

It is an arithmetic number, because the mean of its divisors is an integer number (56028706776).

Almost surely, 2^221002121101 is an apocalyptic number.

It is an amenable number.

221002121101 is a deficient number, since it is larger than the sum of its proper divisors (3112706003).

221002121101 is an equidigital number, since it uses as much as digits as its factorization.

221002121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112706002.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221002121101 its reverse (101121200122), we get a palindrome (322123321223).

The spelling of 221002121101 in words is "two hundred twenty-one billion, two million, one hundred twenty-one thousand, one hundred one".