121020101010 has 48 divisors (see below), whose sum is σ = 315403320960. Its totient is φ = 32194995360.

The previous prime is 121020100997. The next prime is 121020101039. The reversal of 121020101010 is 10101020121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121020100983 and 121020101001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1566906 + ... + 1642325.

It is an arithmetic number, because the mean of its divisors is an integer number (6570902520).

Almost surely, 2^121020101010 is an apocalyptic number.

121020101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121020101010 is an abundant number, since it is smaller than the sum of its proper divisors (194383219950).

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

121020101010 is a wasteful number, since it uses less digits than its factorization.

121020101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3209663 (or 3209660 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121020101010 its reverse (10101020121), we get a palindrome (131121121131).

The spelling of 121020101010 in words is "one hundred twenty-one billion, twenty million, one hundred one thousand, ten".