1002121220111 has 8 divisors (see below), whose sum is σ = 1093260478464. Its totient is φ = 910988183320.

The previous prime is 1002121220059. The next prime is 1002121220119. The reversal of 1002121220111 is 1110221212001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1002121220111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002121220119) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1215365 + ... + 1865838.

It is an arithmetic number, because the mean of its divisors is an integer number (136657559808).

Almost surely, 2^{1002121220111} is an apocalyptic number.

1002121220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1002121220111 is a deficient number, since it is larger than the sum of its proper divisors (91139258353).

1002121220111 is a wasteful number, since it uses less digits than its factorization.

1002121220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110781.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1002121220111 its reverse (1110221212001), we get a palindrome (2112342432112).

The spelling of 1002121220111 in words is "one trillion, two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred eleven".