121222220102 has 4 divisors (see below), whose sum is σ = 181833330156. Its totient is φ = 60611110050.

The previous prime is 121222220099. The next prime is 121222220111. The reversal of 121222220102 is 201022222121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305555024 + ... + 30305555027.

It is an arithmetic number, because the mean of its divisors is an integer number (45458332539).

Almost surely, 2^121222220102 is an apocalyptic number.

121222220102 is a deficient number, since it is larger than the sum of its proper divisors (60611110054).

121222220102 is an equidigital number, since it uses as much as digits as its factorization.

121222220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60611110053.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121222220102 its reverse (201022222121), we get a palindrome (322244442223).

The spelling of 121222220102 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred two".