121211120102 has 4 divisors (see below), whose sum is σ = 181816680156. Its totient is φ = 60605560050.

The previous prime is 121211120099. The next prime is 121211120153. The reversal of 121211120102 is 201021112121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201021112121 = 64013 ⋅3140317.

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, 30302780024 + ... + 30302780027.

It is an arithmetic number, because the mean of its divisors is an integer number (45454170039).

Almost surely, 2^121211120102 is an apocalyptic number.

121211120102 is a deficient number, since it is larger than the sum of its proper divisors (60605560054).

121211120102 is an equidigital number, since it uses as much as digits as its factorization.

121211120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60605560053.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211120102 its reverse (201021112121), we get a palindrome (322232232223).

The spelling of 121211120102 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred two".