121011210021010 has 16 divisors (see below), whose sum is σ = 220267595770200. Its totient is φ = 47860613401216.

The previous prime is 121011210020999. The next prime is 121011210021047. The reversal of 121011210021010 is 10120012110121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101460070962121 + 19551139058889 = 10072739^2 + 4421667^2 .

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, 67983824965 + ... + 67983826744.

Almost surely, 2^{121011210021010} is an apocalyptic number.

121011210021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121011210021010 is a deficient number, since it is larger than the sum of its proper divisors (99256385749190).

121011210021010 is a wasteful number, since it uses less digits than its factorization.

121011210021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135967651805.

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

Adding to 121011210021010 its reverse (10120012110121), we get a palindrome (131131222131131).

The spelling of 121011210021010 in words is "one hundred twenty-one trillion, eleven billion, two hundred ten million, twenty-one thousand, ten".