1221302102 has 16 divisors (see below), whose sum is σ = 1990579200. Its totient is φ = 559849320.

The previous prime is 1221302101. The next prime is 1221302119. The reversal of 1221302102 is 2012031221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221302101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517202 + ... + 519557.

It is an arithmetic number, because the mean of its divisors is an integer number (124411200).

Almost surely, 2^1221302102 is an apocalyptic number.

1221302102 is a deficient number, since it is larger than the sum of its proper divisors (769277098).

1221302102 is a wasteful number, since it uses less digits than its factorization.

1221302102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036811.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221302102 is about 34947.1329582271. The cubic root of 1221302102 is about 1068.9097410787.

Adding to 1221302102 its reverse (2012031221), we get a palindrome (3233333323).

The spelling of 1221302102 in words is "one billion, two hundred twenty-one million, three hundred two thousand, one hundred two".