121221222020102 has 64 divisors (see below), whose sum is σ = 192568985376768. Its totient is φ = 57162853440000.

The previous prime is 121221222020033. The next prime is 121221222020147. The reversal of 121221222020102 is 201020222122121.

It is a super-4 number, since 4×121221222020102⁴ (a number of 57 digits) contains 4444 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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143867378 + ... + 144707514.

It is an arithmetic number, because the mean of its divisors is an integer number (3008890396512).

Almost surely, 2^{121221222020102} is an apocalyptic number.

121221222020102 is a deficient number, since it is larger than the sum of its proper divisors (71347763356666).

121221222020102 is a wasteful number, since it uses less digits than its factorization.

121221222020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840645.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121221222020102 its reverse (201020222122121), we get a palindrome (322241444142223).

The spelling of 121221222020102 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, twenty thousand, one hundred two".