21212202111010 has 32 divisors (see below), whose sum is σ = 38417507174592. Its totient is φ = 8432541391680.

The previous prime is 21212202110951. The next prime is 21212202111011. The reversal of 21212202111010 is 1011120221212.

It is not an unprimeable number, because it can be changed into a prime (21212202111011) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 51804480 + ... + 52212340.

It is an arithmetic number, because the mean of its divisors is an integer number (1200547099206).

Almost surely, 2^{21212202111010} is an apocalyptic number.

21212202111010 is a deficient number, since it is larger than the sum of its proper divisors (17205305063582).

21212202111010 is a wasteful number, since it uses less digits than its factorization.

21212202111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439938.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212202111010 its reverse (1011120221212), we get a palindrome (22223322332222).

The spelling of 21212202111010 in words is "twenty-one trillion, two hundred twelve billion, two hundred two million, one hundred eleven thousand, ten".