101002212221 has 4 divisors (see below), whose sum is σ = 101125236444. Its totient is φ = 100879188000.

The previous prime is 101002212211. The next prime is 101002212281. The reversal of 101002212221 is 122212200101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56698276996 + 44303935225 = 238114^2 + 210485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101002212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101002212196 and 101002212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101002212211) 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, 61510880 + ... + 61512521.

It is an arithmetic number, because the mean of its divisors is an integer number (25281309111).

Almost surely, 2^101002212221 is an apocalyptic number.

It is an amenable number.

101002212221 is a deficient number, since it is larger than the sum of its proper divisors (123024223).

101002212221 is an equidigital number, since it uses as much as digits as its factorization.

101002212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123024222.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101002212221 its reverse (122212200101), we get a palindrome (223214412322).

The spelling of 101002212221 in words is "one hundred one billion, two million, two hundred twelve thousand, two hundred twenty-one".