20101121111211 has 8 divisors (see below), whose sum is σ = 30630279788544. Its totient is φ = 11486354920680.

The previous prime is 20101121111179. The next prime is 20101121111261. The reversal of 20101121111211 is 11211112110102.

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

It is not a de Polignac number, because 20101121111211 - 2⁵ = 20101121111179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20101121111261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478598121675 + ... + 478598121716.

It is an arithmetic number, because the mean of its divisors is an integer number (3828784973568).

Almost surely, 2^{20101121111211} is an apocalyptic number.

20101121111211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20101121111211 is a deficient number, since it is larger than the sum of its proper divisors (10529158677333).

20101121111211 is an equidigital number, since it uses as much as digits as its factorization.

20101121111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957196243401.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 20101121111211 its reverse (11211112110102), we get a palindrome (31312233221313).

The spelling of 20101121111211 in words is "twenty trillion, one hundred one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred eleven".