21121113010202 has 4 divisors (see below), whose sum is σ = 31681669515306. Its totient is φ = 10560556505100.

The previous prime is 21121113010189. The next prime is 21121113010211. The reversal of 21121113010202 is 20201031112112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10835295473401 + 10285817536801 = 3291701^2 + 3207151^2 .

It is a super-2 number, since 2×21121113010202² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280278252549 + ... + 5280278252552.

Almost surely, 2^{21121113010202} is an apocalyptic number.

21121113010202 is a deficient number, since it is larger than the sum of its proper divisors (10560556505104).

21121113010202 is a wasteful number, since it uses less digits than its factorization.

21121113010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560556505103.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121113010202 its reverse (20201031112112), we get a palindrome (41322144122314).

The spelling of 21121113010202 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred thirteen million, ten thousand, two hundred two".