101555212262221 has 4 divisors (see below), whose sum is σ = 101555259681312. Its totient is φ = 101555164843132.

The previous prime is 101555212262201. The next prime is 101555212262227. The reversal of 101555212262221 is 122262212555101.

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 101555212262221 - 2¹³ = 101555212254029 is a prime.

It is a super-2 number, since 2×101555212262221² (a number of 29 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 (101555212262227) 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, 20337175 + ... + 24833668.

It is an arithmetic number, because the mean of its divisors is an integer number (25388814920328).

Almost surely, 2^{101555212262221} is an apocalyptic number.

It is an amenable number.

101555212262221 is a deficient number, since it is larger than the sum of its proper divisors (47419091).

101555212262221 is an equidigital number, since it uses as much as digits as its factorization.

101555212262221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47419090.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 101555212262221 in words is "one hundred one trillion, five hundred fifty-five billion, two hundred twelve million, two hundred sixty-two thousand, two hundred twenty-one".