101221010102 has 4 divisors (see below), whose sum is σ = 151831515156. Its totient is φ = 50610505050.

The previous prime is 101221010101. The next prime is 101221010113. The reversal of 101221010102 is 201010122101.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221010101) by changing a digit.

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 as a sum of consecutive naturals, namely, 25305252524 + ... + 25305252527.

It is an arithmetic number, because the mean of its divisors is an integer number (37957878789).

Almost surely, 2^101221010102 is an apocalyptic number.

101221010102 is a deficient number, since it is larger than the sum of its proper divisors (50610505054).

101221010102 is an equidigital number, since it uses as much as digits as its factorization.

101221010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50610505053.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101221010102 its reverse (201010122101), we get a palindrome (302231132203).

The spelling of 101221010102 in words is "one hundred one billion, two hundred twenty-one million, ten thousand, one hundred two".