21122012020210 has 16 divisors (see below), whose sum is σ = 38044008849600. Its totient is φ = 8443385427376.

The previous prime is 21122012020189. The next prime is 21122012020259. The reversal of 21122012020210 is 1202021022112.

It is a happy number.

It is a super-2 number, since 2×21122012020210² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 677406220 + ... + 677437399.

It is an arithmetic number, because the mean of its divisors is an integer number (2377750553100).

Almost surely, 2^{21122012020210} is an apocalyptic number.

21122012020210 is a deficient number, since it is larger than the sum of its proper divisors (16921996829390).

21122012020210 is a wasteful number, since it uses less digits than its factorization.

21122012020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354845185.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122012020210 its reverse (1202021022112), we get a palindrome (22324033042322).

The spelling of 21122012020210 in words is "twenty-one trillion, one hundred twenty-two billion, twelve million, twenty thousand, two hundred ten".