21202121120102 has 32 divisors (see below), whose sum is σ = 35049525269472. Its totient is φ = 9558665385984.

The previous prime is 21202121120093. The next prime is 21202121120111. The reversal of 21202121120102 is 20102112120212.

It is an interprime number because it is at equal distance from previous prime (21202121120093) and next prime (21202121120111).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33577403 + ... + 34203014.

It is an arithmetic number, because the mean of its divisors is an integer number (1095297664671).

Almost surely, 2^{21202121120102} is an apocalyptic number.

21202121120102 is a deficient number, since it is larger than the sum of its proper divisors (13847404149370).

21202121120102 is a wasteful number, since it uses less digits than its factorization.

21202121120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67780712.

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

Adding to 21202121120102 its reverse (20102112120212), we get a palindrome (41304233240314).

The spelling of 21202121120102 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty thousand, one hundred two".