21155224655314 has 128 divisors (see below), whose sum is σ = 35442197844480. Its totient is φ = 9438247526400.

The previous prime is 21155224655297. The next prime is 21155224655321. The reversal of 21155224655314 is 41355642255112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1431430777 + ... + 1431445555.

It is an arithmetic number, because the mean of its divisors is an integer number (276892170660).

Almost surely, 2^{21155224655314} is an apocalyptic number.

21155224655314 is a deficient number, since it is larger than the sum of its proper divisors (14286973189166).

21155224655314 is a wasteful number, since it uses less digits than its factorization.

21155224655314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15236.

The product of its digits is 1440000, while the sum is 46.

The spelling of 21155224655314 in words is "twenty-one trillion, one hundred fifty-five billion, two hundred twenty-four million, six hundred fifty-five thousand, three hundred fourteen".