102121142 has 16 divisors (see below), whose sum is σ = 165255552. Its totient is φ = 47149440.

The previous prime is 102121141. The next prime is 102121157. The reversal of 102121142 is 241121201.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26534 + ... + 30137.

It is an arithmetic number, because the mean of its divisors is an integer number (10328472).

Almost surely, 2^102121142 is an apocalyptic number.

102121142 is a deficient number, since it is larger than the sum of its proper divisors (63134410).

102121142 is a wasteful number, since it uses less digits than its factorization.

102121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56743.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 102121142 is about 10105.5005813666. The cubic root of 102121142 is about 467.4177719582.

Adding to 102121142 its reverse (241121201), we get a palindrome (343242343).

The spelling of 102121142 in words is "one hundred two million, one hundred twenty-one thousand, one hundred forty-two".