1211210021010 has 64 divisors (see below), whose sum is σ = 3171609768960. Its totient is φ = 293585772480.

The previous prime is 1211210021009. The next prime is 1211210021023. The reversal of 1211210021010 is 101200121121.

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 31 ways as a sum of consecutive naturals, for example, 2151411 + ... + 2655369.

It is an arithmetic number, because the mean of its divisors is an integer number (49556402640).

Almost surely, 2^{1211210021010} is an apocalyptic number.

1211210021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211210021010 is an abundant number, since it is smaller than the sum of its proper divisors (1960399747950).

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

1211210021010 is a wasteful number, since it uses less digits than its factorization.

1211210021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511263.

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

Adding to 1211210021010 its reverse (101200121121), we get a palindrome (1312410142131).

The spelling of 1211210021010 in words is "one trillion, two hundred eleven billion, two hundred ten million, twenty-one thousand, ten".