21012212202 has 32 divisors (see below), whose sum is σ = 43064949888. Its totient is φ = 6832178496.

The previous prime is 21012212159. The next prime is 21012212203. The reversal of 21012212202 is 20221221012.

It is not an unprimeable number, because it can be changed into a prime (21012212203) 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, 135958 + ... + 245985.

It is an arithmetic number, because the mean of its divisors is an integer number (1345779684).

Almost surely, 2^21012212202 is an apocalyptic number.

21012212202 is an abundant number, since it is smaller than the sum of its proper divisors (22052737686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012212202 is a wasteful number, since it uses less digits than its factorization.

21012212202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382174.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012212202 its reverse (20221221012), we get a palindrome (41233433214).

The spelling of 21012212202 in words is "twenty-one billion, twelve million, two hundred twelve thousand, two hundred two".