121211020102 has 32 divisors (see below), whose sum is σ = 193776248160. Its totient is φ = 56666641920.

The previous prime is 121211020093. The next prime is 121211020141. The reversal of 121211020102 is 201020112121.

It is a super-2 number, since 2×121211020102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 4615224 + ... + 4641412.

It is an arithmetic number, because the mean of its divisors is an integer number (6055507755).

Almost surely, 2^121211020102 is an apocalyptic number.

121211020102 is a deficient number, since it is larger than the sum of its proper divisors (72565228058).

121211020102 is a wasteful number, since it uses less digits than its factorization.

121211020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27096.

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

Adding to 121211020102 its reverse (201020112121), we get a palindrome (322231132223).

The spelling of 121211020102 in words is "one hundred twenty-one billion, two hundred eleven million, twenty thousand, one hundred two".