21211212022010 has 8 divisors (see below), whose sum is σ = 38180181639636. Its totient is φ = 8484484808800.

The previous prime is 21211212021997. The next prime is 21211212022043. The reversal of 21211212022010 is 1022021211212.

It can be written as a sum of positive squares in 2 ways, for example, as 19081267340521 + 2129944681489 = 4368211^2 + 1459433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21211212022010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060560601091 + ... + 1060560601110.

Almost surely, 2^{21211212022010} is an apocalyptic number.

21211212022010 is a deficient number, since it is larger than the sum of its proper divisors (16968969617626).

21211212022010 is a wasteful number, since it uses less digits than its factorization.

21211212022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121121202208.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211212022010 its reverse (1022021211212), we get a palindrome (22233233233222).

The spelling of 21211212022010 in words is "twenty-one trillion, two hundred eleven billion, two hundred twelve million, twenty-two thousand, ten".