121121022010 has 24 divisors (see below), whose sum is σ = 220288788540. Its totient is φ = 47948903424.

The previous prime is 121121021981. The next prime is 121121022013. The reversal of 121121022010 is 10220121121.

It can be written as a sum of positive squares in 6 ways, for example, as 86113489401 + 35007532609 = 293451^2 + 187103^2 .

It is not an unprimeable number, because it can be changed into a prime (121121022013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549555 + ... + 737734.

Almost surely, 2^121121022010 is an apocalyptic number.

121121022010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121022010 is a deficient number, since it is larger than the sum of its proper divisors (99167766530).

121121022010 is an equidigital number, since it uses as much as digits as its factorization.

121121022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287490 (or 1287393 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121121022010 its reverse (10220121121), we get a palindrome (131341143131).

The spelling of 121121022010 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, ten".