102121042 has 8 divisors (see below), whose sum is σ = 155027376. Its totient is φ = 50445252.

The previous prime is 102121031. The next prime is 102121043. The reversal of 102121042 is 240121201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (102121043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307428 + ... + 307759.

It is an arithmetic number, because the mean of its divisors is an integer number (19378422).

Almost surely, 2^102121042 is an apocalyptic number.

102121042 is a deficient number, since it is larger than the sum of its proper divisors (52906334).

102121042 is an equidigital number, since it uses as much as digits as its factorization.

102121042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615272.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 102121042 is about 10105.4956335649. The cubic root of 102121042 is about 467.4176193885.

Adding to 102121042 its reverse (240121201), we get a palindrome (342242243).

The spelling of 102121042 in words is "one hundred two million, one hundred twenty-one thousand, forty-two".