2101220102 has 8 divisors (see below), whose sum is σ = 3152867016. Its totient is φ = 1050264432.

The previous prime is 2101220087. The next prime is 2101220167. The reversal of 2101220102 is 2010221012.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165143 + ... + 177410.

It is an arithmetic number, because the mean of its divisors is an integer number (394108377).

Almost surely, 2^2101220102 is an apocalyptic number.

2101220102 is a deficient number, since it is larger than the sum of its proper divisors (1051646914).

2101220102 is a wasteful number, since it uses less digits than its factorization.

2101220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345622.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2101220102 is about 45839.0674207057. The cubic root of 2101220102 is about 1280.8271228773.

Adding to 2101220102 its reverse (2010221012), we get a palindrome (4111441114).

It can be divided in two parts, 21012 and 20102, that multiplied together give a palindrome (422383224).

The spelling of 2101220102 in words is "two billion, one hundred one million, two hundred twenty thousand, one hundred two".