20111121111010 has 8 divisors (see below), whose sum is σ = 36200017999836. Its totient is φ = 8044448444400.

The previous prime is 20111121110917. The next prime is 20111121111097. The reversal of 20111121111010 is 1011112111102.

It can be written as a sum of positive squares in 2 ways, for example, as 18903634404561 + 1207486706449 = 4347831^2 + 1098857^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005556055541 + ... + 1005556055560.

Almost surely, 2^{20111121111010} is an apocalyptic number.

20111121111010 is a deficient number, since it is larger than the sum of its proper divisors (16088896888826).

20111121111010 is a wasteful number, since it uses less digits than its factorization.

20111121111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011112111108.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 20111121111010 its reverse (1011112111102), we get a palindrome (21122233222112).

It can be divided in two parts, 20111 and 121111010, that added together give a palindrome (121131121).

The spelling of 20111121111010 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, ten".