1213121103000 has 128 divisors (see below), whose sum is σ = 3785386288320. Its totient is φ = 323460633600.

The previous prime is 1213121102983. The next prime is 1213121103001. The reversal of 1213121103000 is 3011213121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213121103001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32792514 + ... + 32829486.

Almost surely, 2^{1213121103000} is an apocalyptic number.

1213121103000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213121103000 is an abundant number, since it is smaller than the sum of its proper divisors (2572265185320).

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

1213121103000 is a wasteful number, since it uses less digits than its factorization.

1213121103000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47934 (or 47920 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1213121103000 its reverse (3011213121), we get a palindrome (1216132316121).

The spelling of 1213121103000 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, one hundred three thousand".