21122200202 has 4 divisors (see below), whose sum is σ = 31683300306. Its totient is φ = 10561100100.

The previous prime is 21122200189. The next prime is 21122200219. The reversal of 21122200202 is 20200222112.

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., 14096575441 + 7025624761 = 118729^2 + 83819^2 .

It is a super-2 number, since 2×21122200202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280550049 + ... + 5280550052.

Almost surely, 2^21122200202 is an apocalyptic number.

21122200202 is a deficient number, since it is larger than the sum of its proper divisors (10561100104).

21122200202 is a wasteful number, since it uses less digits than its factorization.

21122200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10561100103.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21122200202 its reverse (20200222112), we get a palindrome (41322422314).

The spelling of 21122200202 in words is "twenty-one billion, one hundred twenty-two million, two hundred thousand, two hundred two".