21211222001210 has 16 divisors (see below), whose sum is σ = 38206585391616. Its totient is φ = 8478625291728.

The previous prime is 21211222001197. The next prime is 21211222001401. The reversal of 21211222001210 is 1210022211212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732923402 + ... + 732952341.

It is an arithmetic number, because the mean of its divisors is an integer number (2387911586976).

Almost surely, 2^{21211222001210} is an apocalyptic number.

21211222001210 is a deficient number, since it is larger than the sum of its proper divisors (16995363390406).

21211222001210 is a wasteful number, since it uses less digits than its factorization.

21211222001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465877197.

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

Adding to 21211222001210 its reverse (1210022211212), we get a palindrome (22421244212422).

The spelling of 21211222001210 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one thousand, two hundred ten".