101010010211221 has 4 divisors (see below), whose sum is σ = 101010030563052. Its totient is φ = 101009989859392.

The previous prime is 101010010211219. The next prime is 101010010211263. The reversal of 101010010211221 is 122112010010101.

It is a happy number.

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 71687633591025 + 29322376620196 = 8466855^2 + 5415014^2 .

It is a cyclic number.

It is not a de Polignac number, because 101010010211221 - 2¹ = 101010010211219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101010010211291) 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, 2697711 + ... + 14467123.

It is an arithmetic number, because the mean of its divisors is an integer number (25252507640763).

Almost surely, 2^{101010010211221} is an apocalyptic number.

It is an amenable number.

101010010211221 is a deficient number, since it is larger than the sum of its proper divisors (20351831).

101010010211221 is an equidigital number, since it uses as much as digits as its factorization.

101010010211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20351830.

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

Adding to 101010010211221 its reverse (122112010010101), we get a palindrome (223122020221322).

The spelling of 101010010211221 in words is "one hundred one trillion, ten billion, ten million, two hundred eleven thousand, two hundred twenty-one".