1911211020102 has 32 divisors (see below), whose sum is σ = 3848324198400. Its totient is φ = 632753866080.

The previous prime is 1911211020013. The next prime is 1911211020109. The reversal of 1911211020102 is 2010201121191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1911211020109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15845073 + ... + 15965235.

It is an arithmetic number, because the mean of its divisors is an integer number (120260131200).

Almost surely, 2^{1911211020102} is an apocalyptic number.

1911211020102 is an abundant number, since it is smaller than the sum of its proper divisors (1937113178298).

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

1911211020102 is a wasteful number, since it uses less digits than its factorization.

1911211020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138108.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 1911211020102 its reverse (2010201121191), we get a palindrome (3921412141293).

The spelling of 1911211020102 in words is "one trillion, nine hundred eleven billion, two hundred eleven million, twenty thousand, one hundred two".