21000201001011 has 12 divisors (see below), whose sum is σ = 30333739906392. Its totient is φ = 14000080352256.

The previous prime is 21000201001009. The next prime is 21000201001037. The reversal of 21000201001011 is 11010010200012.

It is a happy number.

It is not a de Polignac number, because 21000201001011 - 2¹ = 21000201001009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21000201000984 and 21000201001002.

It is not an unprimeable number, because it can be changed into a prime (21000201001001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1914661 + ... + 6757686.

It is an arithmetic number, because the mean of its divisors is an integer number (2527811658866).

Almost surely, 2^{21000201001011} is an apocalyptic number.

21000201001011 is a deficient number, since it is larger than the sum of its proper divisors (9333538905381).

21000201001011 is a wasteful number, since it uses less digits than its factorization.

21000201001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8941410 (or 8941407 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 21000201001011 its reverse (11010010200012), we get a palindrome (32010211201023).

The spelling of 21000201001011 in words is "twenty-one trillion, two hundred one million, one thousand, eleven".