221121010102 has 16 divisors (see below), whose sum is σ = 334290783024. Its totient is φ = 109691140000.

The previous prime is 221121010073. The next prime is 221121010147. The reversal of 221121010102 is 201010121122.

It is a super-2 number, since 2×221121010102² (a number of 23 digits) contains 22 as substring.

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, 1062852 + ... + 1253752.

It is an arithmetic number, because the mean of its divisors is an integer number (20893173939).

Almost surely, 2^221121010102 is an apocalyptic number.

221121010102 is a deficient number, since it is larger than the sum of its proper divisors (113169772922).

221121010102 is a wasteful number, since it uses less digits than its factorization.

221121010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195455.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221121010102 its reverse (201010121122), we get a palindrome (422131131224).

The spelling of 221121010102 in words is "two hundred twenty-one billion, one hundred twenty-one million, ten thousand, one hundred two".