21202121120012 has 72 divisors (see below), whose sum is σ = 46591082465760. Its totient is φ = 8391843989760.

The previous prime is 21202121120003. The next prime is 21202121120093. The reversal of 21202121120012 is 21002112120212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80959289 + ... + 81220752.

It is an arithmetic number, because the mean of its divisors is an integer number (647098367580).

Almost surely, 2^{21202121120012} is an apocalyptic number.

It is an amenable number.

21202121120012 is an abundant number, since it is smaller than the sum of its proper divisors (25388961345748).

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

21202121120012 is a wasteful number, since it uses less digits than its factorization.

21202121120012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162180111 (or 162180102 counting only the distinct ones).

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

Adding to 21202121120012 its reverse (21002112120212), we get a palindrome (42204233240224).

The spelling of 21202121120012 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty thousand, twelve".