81225119715102 has 48 divisors (see below), whose sum is σ = 199097263153152. Its totient is φ = 24613672639320.

The previous prime is 81225119715101. The next prime is 81225119715107. The reversal of 81225119715102 is 20151791152218.

81225119715102 is a `hidden beast` number, since 8 + 1 + 2 + 2 + 51 + 19 + 71 + 510 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81225119715101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7596807198 + ... + 7596817889.

It is an arithmetic number, because the mean of its divisors is an integer number (4147859649024).

Almost surely, 2^{81225119715102} is an apocalyptic number.

81225119715102 is an abundant number, since it is smaller than the sum of its proper divisors (117872143438050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81225119715102 is a wasteful number, since it uses less digits than its factorization.

81225119715102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15193625115 (or 15193625103 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 45.

The spelling of 81225119715102 in words is "eighty-one trillion, two hundred twenty-five billion, one hundred nineteen million, seven hundred fifteen thousand, one hundred two".