21121010222 has 16 divisors (see below), whose sum is σ = 36125529552. Its totient is φ = 9174737280.

The previous prime is 21121010221. The next prime is 21121010269. The reversal of 21121010222 is 22201012112.

It is a junction number, because it is equal to n+sod(n) for n = 21121010197 and 21121010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121010221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23892104 + ... + 23892987.

It is an arithmetic number, because the mean of its divisors is an integer number (2257845597).

Almost surely, 2^21121010222 is an apocalyptic number.

21121010222 is a deficient number, since it is larger than the sum of its proper divisors (15004519330).

21121010222 is a wasteful number, since it uses less digits than its factorization.

21121010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47785123.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121010222 its reverse (22201012112), we get a palindrome (43322022334).

The spelling of 21121010222 in words is "twenty-one billion, one hundred twenty-one million, ten thousand, two hundred twenty-two".