101011212122221 has 4 divisors (see below), whose sum is σ = 104269638319744. Its totient is φ = 97752785924700.

The previous prime is 101011212122209. The next prime is 101011212122251. The reversal of 101011212122221 is 122221212110101.

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 101011212122221 - 2⁵ = 101011212122189 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 (101011212122251) 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, 1629213098715 + ... + 1629213098776.

It is an arithmetic number, because the mean of its divisors is an integer number (26067409579936).

Almost surely, 2^{101011212122221} is an apocalyptic number.

It is an amenable number.

101011212122221 is a deficient number, since it is larger than the sum of its proper divisors (3258426197523).

101011212122221 is an equidigital number, since it uses as much as digits as its factorization.

101011212122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258426197522.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101011212122221 its reverse (122221212110101), we get a palindrome (223232424232322).

The spelling of 101011212122221 in words is "one hundred one trillion, eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".