221020111121102 has 32 divisors (see below), whose sum is σ = 340090349491200. Its totient is φ = 107690464742400.

The previous prime is 221020111121093. The next prime is 221020111121129. The reversal of 221020111121102 is 201121111020122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133634174 + ... + 135277982.

It is an arithmetic number, because the mean of its divisors is an integer number (10627823421600).

Almost surely, 2^{221020111121102} is an apocalyptic number.

221020111121102 is a deficient number, since it is larger than the sum of its proper divisors (119070238370098).

221020111121102 is a wasteful number, since it uses less digits than its factorization.

221020111121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654092.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221020111121102 its reverse (201121111020122), we get a palindrome (422141222141224).

The spelling of 221020111121102 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, one hundred twenty-one thousand, one hundred two".