102311212312221 has 32 divisors (see below), whose sum is σ = 155137793826816. Its totient is φ = 59412451560000.

The previous prime is 102311212312213. The next prime is 102311212312241. The reversal of 102311212312221 is 122213212113201.

It is not a de Polignac number, because 102311212312221 - 2³ = 102311212312213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102311212312191 and 102311212312200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102311212312241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495000441 + ... + 495207086.

It is an arithmetic number, because the mean of its divisors is an integer number (4848056057088).

Almost surely, 2^{102311212312221} is an apocalyptic number.

102311212312221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102311212312221 is a deficient number, since it is larger than the sum of its proper divisors (52826581514595).

102311212312221 is a wasteful number, since it uses less digits than its factorization.

102311212312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990207673.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 102311212312221 its reverse (122213212113201), we get a palindrome (224524424425422).

The spelling of 102311212312221 in words is "one hundred two trillion, three hundred eleven billion, two hundred twelve million, three hundred twelve thousand, two hundred twenty-one".