121121213231210 has 16 divisors (see below), whose sum is σ = 218495247683976. Its totient is φ = 48342471099648.

The previous prime is 121121213231159. The next prime is 121121213231267. The reversal of 121121213231210 is 12132312121121.

It can be written as a sum of positive squares in 4 ways, for example, as 118020173236681 + 3101039994529 = 10863709^2 + 1760977^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13251769307 + ... + 13251778446.

Almost surely, 2^{121121213231210} is an apocalyptic number.

121121213231210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121213231210 is a deficient number, since it is larger than the sum of its proper divisors (97374034452766).

121121213231210 is a wasteful number, since it uses less digits than its factorization.

121121213231210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26503548217.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 121121213231210 its reverse (12132312121121), we get a palindrome (133253525352331).

The spelling of 121121213231210 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred ten".