21011002211001 has 64 divisors (see below), whose sum is σ = 32427072921600. Its totient is φ = 11981563584000.

The previous prime is 21011002210997. The next prime is 21011002211011. The reversal of 21011002211001 is 10011220011012.

It is not a de Polignac number, because 21011002211001 - 2² = 21011002210997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011002211011) 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, 11434450 + ... + 13144148.

It is an arithmetic number, because the mean of its divisors is an integer number (506673014400).

Almost surely, 2^{21011002211001} is an apocalyptic number.

It is an amenable number.

21011002211001 is a deficient number, since it is larger than the sum of its proper divisors (11416070710599).

21011002211001 is a wasteful number, since it uses less digits than its factorization.

21011002211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710078.

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

Adding to 21011002211001 its reverse (10011220011012), we get a palindrome (31022222222013).

The spelling of 21011002211001 in words is "twenty-one trillion, eleven billion, two million, two hundred eleven thousand, one".