201220200111021 has 32 divisors (see below), whose sum is σ = 330228737771520. Its totient is φ = 106131303635904.

The previous prime is 201220200110989. The next prime is 201220200111071. The reversal of 201220200111021 is 120111002022102.

201220200111021 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 201220200111021 - 2⁵ = 201220200110989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220200111071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19438695 + ... + 27933908.

It is an arithmetic number, because the mean of its divisors is an integer number (10319648055360).

Almost surely, 2^{201220200111021} is an apocalyptic number.

201220200111021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201220200111021 is a deficient number, since it is larger than the sum of its proper divisors (129008537660499).

201220200111021 is a wasteful number, since it uses less digits than its factorization.

201220200111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47388185.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201220200111021 its reverse (120111002022102), we get a palindrome (321331202133123).

The spelling of 201220200111021 in words is "two hundred one trillion, two hundred twenty billion, two hundred million, one hundred eleven thousand, twenty-one".