21003001142 has 4 divisors (see below), whose sum is σ = 31504501716. Its totient is φ = 10501500570.

The previous prime is 21003001133. The next prime is 21003001183. The reversal of 21003001142 is 24110030012.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21003001142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250750284 + ... + 5250750287.

It is an arithmetic number, because the mean of its divisors is an integer number (7876125429).

Almost surely, 2^21003001142 is an apocalyptic number.

21003001142 is a deficient number, since it is larger than the sum of its proper divisors (10501500574).

21003001142 is a wasteful number, since it uses less digits than its factorization.

21003001142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501500573.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21003001142 its reverse (24110030012), we get a palindrome (45113031154).

The spelling of 21003001142 in words is "twenty-one billion, three million, one thousand, one hundred forty-two".