1211111212002 has 64 divisors (see below), whose sum is σ = 2468447654400. Its totient is φ = 396029363840.

The previous prime is 1211111211971. The next prime is 1211111212079. The reversal of 1211111212002 is 2002121111121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534234073 + ... + 534236339.

It is an arithmetic number, because the mean of its divisors is an integer number (38569494600).

Almost surely, 2^{1211111212002} is an apocalyptic number.

1211111212002 is an abundant number, since it is smaller than the sum of its proper divisors (1257336442398).

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

1211111212002 is a wasteful number, since it uses less digits than its factorization.

1211111212002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211111212002 its reverse (2002121111121), we get a palindrome (3213232323123).

It can be divided in two parts, 121111121 and 2002, that multiplied together give a palindrome (242464464242).

The spelling of 1211111212002 in words is "one trillion, two hundred eleven billion, one hundred eleven million, two hundred twelve thousand, two".