121220210102 has 16 divisors (see below), whose sum is σ = 191419229040. Its totient is φ = 57414430368.

The previous prime is 121220210077. The next prime is 121220210107. The reversal of 121220210102 is 201012022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220210107) 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, 245888 + ... + 550364.

It is an arithmetic number, because the mean of its divisors is an integer number (11963701815).

Almost surely, 2^121220210102 is an apocalyptic number.

121220210102 is a deficient number, since it is larger than the sum of its proper divisors (70199018938).

121220210102 is a wasteful number, since it uses less digits than its factorization.

121220210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314975.

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

Adding to 121220210102 its reverse (201012022121), we get a palindrome (322232232223).

The spelling of 121220210102 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred ten thousand, one hundred two".