121210101021010 has 16 divisors (see below), whose sum is σ = 221754873344472. Its totient is φ = 47689220073600.

The previous prime is 121210101020989. The next prime is 121210101021019. The reversal of 121210101021010 is 10120101012121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 84725710487649 + 36484390533361 = 9204657^2 + 6040231^2 .

It is a super-2 number, since 2×121210101021010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121210101021019) 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, 99352541211 + ... + 99352542430.

Almost surely, 2^{121210101021010} is an apocalyptic number.

121210101021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121210101021010 is a deficient number, since it is larger than the sum of its proper divisors (100544772323462).

121210101021010 is a wasteful number, since it uses less digits than its factorization.

121210101021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198705083709.

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

Adding to 121210101021010 its reverse (10120101012121), we get a palindrome (131330202033131).

The spelling of 121210101021010 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred one million, twenty-one thousand, ten".