21212033203011 has 32 divisors (see below), whose sum is σ = 33383556845568. Its totient is φ = 11723906517120.

The previous prime is 21212033203007. The next prime is 21212033203019. The reversal of 21212033203011 is 11030233021212.

It is not a de Polignac number, because 21212033203011 - 2² = 21212033203007 is a prime.

It is a super-2 number, since 2×21212033203011² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21212033203019) 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, 7457820 + ... + 9901673.

It is an arithmetic number, because the mean of its divisors is an integer number (1043236151424).

Almost surely, 2^{21212033203011} is an apocalyptic number.

21212033203011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21212033203011 is a deficient number, since it is larger than the sum of its proper divisors (12171523642557).

21212033203011 is a wasteful number, since it uses less digits than its factorization.

21212033203011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17361411.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21212033203011 its reverse (11030233021212), we get a palindrome (32242266224223).

The spelling of 21212033203011 in words is "twenty-one trillion, two hundred twelve billion, thirty-three million, two hundred three thousand, eleven".