121213030340 has 12 divisors (see below), whose sum is σ = 254547363756. Its totient is φ = 48485212128.

The previous prime is 121213030333. The next prime is 121213030357. The reversal of 121213030340 is 43030312121.

It can be written as a sum of positive squares in 2 ways, for example, as 72077214784 + 49135815556 = 268472^2 + 221666^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 6060651517 = 121213030340 / (1 + 2 + 1 + 2 + 1 + 3 + 0 + 3 + 0 + 3 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030325739 + ... + 3030325778.

It is an arithmetic number, because the mean of its divisors is an integer number (21212280313).

Almost surely, 2^121213030340 is an apocalyptic number.

121213030340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121213030340 is an abundant number, since it is smaller than the sum of its proper divisors (133334333416).

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

121213030340 is a wasteful number, since it uses less digits than its factorization.

121213030340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060651526 (or 6060651524 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 121213030340 its reverse (43030312121), we get a palindrome (164243342461).

The spelling of 121213030340 in words is "one hundred twenty-one billion, two hundred thirteen million, thirty thousand, three hundred forty".