21211011202 has 4 divisors (see below), whose sum is σ = 31816516806. Its totient is φ = 10605505600.

The previous prime is 21211011193. The next prime is 21211011203. The reversal of 21211011202 is 20211011212.

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., 18384919281 + 2826091921 = 135591^2 + 53161^2 .

It is a super-2 number, since 2×21211011202² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211011203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5302752799 + ... + 5302752802.

Almost surely, 2^21211011202 is an apocalyptic number.

21211011202 is a deficient number, since it is larger than the sum of its proper divisors (10605505604).

21211011202 is a wasteful number, since it uses less digits than its factorization.

21211011202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605505603.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21211011202 its reverse (20211011212), we get a palindrome (41422022414).

The spelling of 21211011202 in words is "twenty-one billion, two hundred eleven million, eleven thousand, two hundred two".