21002214142 has 32 divisors (see below), whose sum is σ = 38781292032. Its totient is φ = 8306859744.

The previous prime is 21002214113. The next prime is 21002214151. The reversal of 21002214142 is 24141220012.

It is a congruent number.

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, 1234063 + ... + 1250965.

It is an arithmetic number, because the mean of its divisors is an integer number (1211915376).

Almost surely, 2^21002214142 is an apocalyptic number.

21002214142 is a deficient number, since it is larger than the sum of its proper divisors (17779077890).

21002214142 is a wasteful number, since it uses less digits than its factorization.

21002214142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23752.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21002214142 its reverse (24141220012), we get a palindrome (45143434154).

The spelling of 21002214142 in words is "twenty-one billion, two million, two hundred fourteen thousand, one hundred forty-two".