21311223322102 has 32 divisors (see below), whose sum is σ = 37713865918464. Its totient is φ = 8838325108800.

The previous prime is 21311223322099. The next prime is 21311223322157. The reversal of 21311223322102 is 20122332211312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7788373 + ... + 10162735.

It is an arithmetic number, because the mean of its divisors is an integer number (1178558309952).

Almost surely, 2^{21311223322102} is an apocalyptic number.

21311223322102 is a deficient number, since it is larger than the sum of its proper divisors (16402642596362).

21311223322102 is a wasteful number, since it uses less digits than its factorization.

21311223322102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395084.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21311223322102 its reverse (20122332211312), we get a palindrome (41433555533414).

The spelling of 21311223322102 in words is "twenty-one trillion, three hundred eleven billion, two hundred twenty-three million, three hundred twenty-two thousand, one hundred two".