102121566442 has 32 divisors (see below), whose sum is σ = 179698134528. Its totient is φ = 42617694336.

The previous prime is 102121566397. The next prime is 102121566487. The reversal of 102121566442 is 244665121201.

It is an interprime number because it is at equal distance from previous prime (102121566397) and next prime (102121566487).

It is a junction number, because it is equal to n+sod(n) for n = 102121566398 and 102121566407.

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, 264283 + ... + 523534.

It is an arithmetic number, because the mean of its divisors is an integer number (5615566704).

Almost surely, 2^102121566442 is an apocalyptic number.

102121566442 is a deficient number, since it is larger than the sum of its proper divisors (77576568086).

102121566442 is a wasteful number, since it uses less digits than its factorization.

102121566442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788070.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 102121566442 its reverse (244665121201), we get a palindrome (346786687643).

The spelling of 102121566442 in words is "one hundred two billion, one hundred twenty-one million, five hundred sixty-six thousand, four hundred forty-two".