1011211200021 has 16 divisors (see below), whose sum is σ = 1510605430848. Its totient is φ = 596291616000.

The previous prime is 1011211200019. The next prime is 1011211200029. The reversal of 1011211200021 is 1200021121101.

1011211200021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1011211200021 - 2¹ = 1011211200019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211200029) 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, 414090180 + ... + 414092621.

It is an arithmetic number, because the mean of its divisors is an integer number (94412839428).

Almost surely, 2^{1011211200021} is an apocalyptic number.

1011211200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011211200021 is a deficient number, since it is larger than the sum of its proper divisors (499394230827).

1011211200021 is a wasteful number, since it uses less digits than its factorization.

1011211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828182852.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011211200021 its reverse (1200021121101), we get a palindrome (2211232321122).

The spelling of 1011211200021 in words is "one trillion, eleven billion, two hundred eleven million, two hundred thousand, twenty-one".