102240115521 has 16 divisors (see below), whose sum is σ = 136575755904. Its totient is φ = 68032358784.

The previous prime is 102240115513. The next prime is 102240115561. The reversal of 102240115521 is 125511042201.

It is a happy number.

It is not a de Polignac number, because 102240115521 - 2³ = 102240115513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102240115491 and 102240115500.

It is not an unprimeable number, because it can be changed into a prime (102240115511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5989020 + ... + 6006066.

It is an arithmetic number, because the mean of its divisors is an integer number (8535984744).

Almost surely, 2^102240115521 is an apocalyptic number.

It is an amenable number.

102240115521 is a deficient number, since it is larger than the sum of its proper divisors (34335640383).

102240115521 is a wasteful number, since it uses less digits than its factorization.

102240115521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20680.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 102240115521 its reverse (125511042201), we get a palindrome (227751157722).

The spelling of 102240115521 in words is "one hundred two billion, two hundred forty million, one hundred fifteen thousand, five hundred twenty-one".