21010211142 has 32 divisors (see below), whose sum is σ = 42551308800. Its totient is φ = 6915020640.

The previous prime is 21010211137. The next prime is 21010211161. The reversal of 21010211142 is 24111201012.

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, 920484 + ... + 943032.

It is an arithmetic number, because the mean of its divisors is an integer number (1329728400).

Almost surely, 2^21010211142 is an apocalyptic number.

21010211142 is an abundant number, since it is smaller than the sum of its proper divisors (21541097658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010211142 is a wasteful number, since it uses less digits than its factorization.

21010211142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24508.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21010211142 its reverse (24111201012), we get a palindrome (45121412154).

The spelling of 21010211142 in words is "twenty-one billion, ten million, two hundred eleven thousand, one hundred forty-two".