111021110202021 has 8 divisors (see below), whose sum is σ = 148590991602240. Its totient is φ = 73732651134912.

The previous prime is 111021110202011. The next prime is 111021110202029. The reversal of 111021110202021 is 120202011120111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111021110202021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021110202029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70355582356 + ... + 70355583933.

It is an arithmetic number, because the mean of its divisors is an integer number (18573873950280).

Almost surely, 2^{111021110202021} is an apocalyptic number.

It is an amenable number.

111021110202021 is a deficient number, since it is larger than the sum of its proper divisors (37569881400219).

111021110202021 is a wasteful number, since it uses less digits than its factorization.

111021110202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140711166555.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111021110202021 its reverse (120202011120111), we get a palindrome (231223121322132).

The spelling of 111021110202021 in words is "one hundred eleven trillion, twenty-one billion, one hundred ten million, two hundred two thousand, twenty-one".