21010302142 has 16 divisors (see below), whose sum is σ = 34445734272. Its totient is φ = 9568258560.

The previous prime is 21010302097. The next prime is 21010302143. The reversal of 21010302142 is 24120301012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010302143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9965883 + ... + 9967990.

It is an arithmetic number, because the mean of its divisors is an integer number (2152858392).

Almost surely, 2^21010302142 is an apocalyptic number.

21010302142 is a deficient number, since it is larger than the sum of its proper divisors (13435432130).

21010302142 is a wasteful number, since it uses less digits than its factorization.

21010302142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19933923.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21010302142 its reverse (24120301012), we get a palindrome (45130603154).

The spelling of 21010302142 in words is "twenty-one billion, ten million, three hundred two thousand, one hundred forty-two".