121445102100 has 144 divisors (see below), whose sum is σ = 410917810688. Its totient is φ = 27113304960.

The previous prime is 121445102071. The next prime is 121445102131. The reversal of 121445102100 is 1201544121.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 582154 + ... + 762753.

Almost surely, 2^121445102100 is an apocalyptic number.

121445102100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121445102100 is an abundant number, since it is smaller than the sum of its proper divisors (289472708588).

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

121445102100 is a wasteful number, since it uses less digits than its factorization.

121445102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344974 (or 1344967 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 121445102100 its reverse (1201544121), we get a palindrome (122646646221).

The spelling of 121445102100 in words is "one hundred twenty-one billion, four hundred forty-five million, one hundred two thousand, one hundred".