1201212101010 has 32 divisors (see below), whose sum is σ = 2895498181440. Its totient is φ = 318924433728.

The previous prime is 1201212100927. The next prime is 1201212101027. The reversal of 1201212101010 is 101012121021.

It is a super-2 number, since 2×1201212101010² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87417592 + ... + 87431331.

It is an arithmetic number, because the mean of its divisors is an integer number (90484318170).

Almost surely, 2^{1201212101010} is an apocalyptic number.

1201212101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1201212101010 is an abundant number, since it is smaller than the sum of its proper divisors (1694286080430).

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

1201212101010 is a wasteful number, since it uses less digits than its factorization.

1201212101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174849162.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1201212101010 its reverse (101012121021), we get a palindrome (1302224222031).

The spelling of 1201212101010 in words is "one trillion, two hundred one billion, two hundred twelve million, one hundred one thousand, ten".