121121011210 has 16 divisors (see below), whose sum is σ = 218922462792. Its totient is φ = 48247372800.

The previous prime is 121121011157. The next prime is 121121011211. The reversal of 121121011210 is 12110121121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 96372372721 + 24748638489 = 310439^2 + 157317^2 .

It is not an unprimeable number, because it can be changed into a prime (121121011211) 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, 25126431 + ... + 25131250.

Almost surely, 2^121121011210 is an apocalyptic number.

121121011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121011210 is a deficient number, since it is larger than the sum of its proper divisors (97801451582).

121121011210 is a wasteful number, since it uses less digits than its factorization.

121121011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50257929.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121121011210 its reverse (12110121121), we get a palindrome (133231132331).

The spelling of 121121011210 in words is "one hundred twenty-one billion, one hundred twenty-one million, eleven thousand, two hundred ten".