21142020212 has 24 divisors (see below), whose sum is σ = 38530044672. Its totient is φ = 10139472000.

The previous prime is 21142020209. The next prime is 21142020239. The reversal of 21142020212 is 21202024112.

It is a congruent number.

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, 740414 + ... + 768437.

It is an arithmetic number, because the mean of its divisors is an integer number (1605418528).

Almost surely, 2^21142020212 is an apocalyptic number.

It is an amenable number.

21142020212 is a deficient number, since it is larger than the sum of its proper divisors (17388024460).

21142020212 is a wasteful number, since it uses less digits than its factorization.

21142020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508999 (or 1508997 counting only the distinct ones).

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

Adding to 21142020212 its reverse (21202024112), we get a palindrome (42344044324).

The spelling of 21142020212 in words is "twenty-one billion, one hundred forty-two million, twenty thousand, two hundred twelve".