21141243202 has 4 divisors (see below), whose sum is σ = 31711864806. Its totient is φ = 10570621600.

The previous prime is 21141243191. The next prime is 21141243203. The reversal of 21141243202 is 20234214112.

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

It can be written as a sum of positive squares in only one way, i.e., 20640781561 + 500461641 = 143669^2 + 22371^2 .

It is a super-2 number, since 2×21141243202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21141243203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5285310799 + ... + 5285310802.

Almost surely, 2^21141243202 is an apocalyptic number.

21141243202 is a deficient number, since it is larger than the sum of its proper divisors (10570621604).

21141243202 is a wasteful number, since it uses less digits than its factorization.

21141243202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10570621603.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21141243202 its reverse (20234214112), we get a palindrome (41375457314).

The spelling of 21141243202 in words is "twenty-one billion, one hundred forty-one million, two hundred forty-three thousand, two hundred two".