102121442 has 16 divisors (see below), whose sum is σ = 157168512. Its totient is φ = 49747920.

The previous prime is 102121421. The next prime is 102121463. The reversal of 102121442 is 244121201.

It is an interprime number because it is at equal distance from previous prime (102121421) and next prime (102121463).

It is a self number, because there is not a number n which added to its sum of digits gives 102121442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9143 + ... + 16965.

It is an arithmetic number, because the mean of its divisors is an integer number (9823032).

Almost surely, 2^102121442 is an apocalyptic number.

102121442 is a deficient number, since it is larger than the sum of its proper divisors (55047070).

102121442 is a wasteful number, since it uses less digits than its factorization.

102121442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 102121442 is about 10105.5154247569. The cubic root of 102121442 is about 467.4182296669.

Adding to 102121442 its reverse (244121201), we get a palindrome (346242643).

The spelling of 102121442 in words is "one hundred two million, one hundred twenty-one thousand, four hundred forty-two".