121121112102 has 16 divisors (see below), whose sum is σ = 244091403072. Its totient is φ = 40065507560.

The previous prime is 121121112071. The next prime is 121121112103. The reversal of 121121112102 is 201211121121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121112103) 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, 77048268 + ... + 77049839.

It is an arithmetic number, because the mean of its divisors is an integer number (15255712692).

Almost surely, 2^121121112102 is an apocalyptic number.

121121112102 is an abundant number, since it is smaller than the sum of its proper divisors (122970290970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121112102 is a wasteful number, since it uses less digits than its factorization.

121121112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154098243.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121121112102 its reverse (201211121121), we get a palindrome (322332233223).

The spelling of 121121112102 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, one hundred two".