221020121102 has 16 divisors (see below), whose sum is σ = 361678708224. Its totient is φ = 100461075000.

The previous prime is 221020121099. The next prime is 221020121111. The reversal of 221020121102 is 201121020122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921077 + ... + 1135967.

It is an arithmetic number, because the mean of its divisors is an integer number (22604919264).

Almost surely, 2^221020121102 is an apocalyptic number.

221020121102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221020121102 is a deficient number, since it is larger than the sum of its proper divisors (140658587122).

221020121102 is a wasteful number, since it uses less digits than its factorization.

221020121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261655.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020121102 its reverse (201121020122), we get a palindrome (422141141224).

The spelling of 221020121102 in words is "two hundred twenty-one billion, twenty million, one hundred twenty-one thousand, one hundred two".