101421210033221 has 4 divisors (see below), whose sum is σ = 109222841574252. Its totient is φ = 93619578492192.

The previous prime is 101421210033131. The next prime is 101421210033229. The reversal of 101421210033221 is 122330012124101.

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 4821581556100 + 96599628477121 = 2195810^2 + 9828511^2 .

It is a cyclic number.

It is not a de Polignac number, because 101421210033221 - 2²² = 101421205838917 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 (101421210033229) 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, 3900815770496 + ... + 3900815770521.

It is an arithmetic number, because the mean of its divisors is an integer number (27305710393563).

Almost surely, 2^{101421210033221} is an apocalyptic number.

It is an amenable number.

101421210033221 is a deficient number, since it is larger than the sum of its proper divisors (7801631541031).

101421210033221 is an equidigital number, since it uses as much as digits as its factorization.

101421210033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7801631541030.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 101421210033221 its reverse (122330012124101), we get a palindrome (223751222157322).

The spelling of 101421210033221 in words is "one hundred one trillion, four hundred twenty-one billion, two hundred ten million, thirty-three thousand, two hundred twenty-one".