21020002230111 has 64 divisors (see below), whose sum is σ = 28889979955200. Its totient is φ = 13590771981696.

The previous prime is 21020002230091. The next prime is 21020002230167. The reversal of 21020002230111 is 11103220002012.

It is not a de Polignac number, because 21020002230111 - 2⁵ = 21020002230079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020002230011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1585331800 + ... + 1585345058.

It is an arithmetic number, because the mean of its divisors is an integer number (451405936800).

Almost surely, 2^{21020002230111} is an apocalyptic number.

21020002230111 is a deficient number, since it is larger than the sum of its proper divisors (7869977725089).

21020002230111 is a wasteful number, since it uses less digits than its factorization.

21020002230111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13988.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21020002230111 its reverse (11103220002012), we get a palindrome (32123222232123).

The spelling of 21020002230111 in words is "twenty-one trillion, twenty billion, two million, two hundred thirty thousand, one hundred eleven".