21122002021001 has 4 divisors (see below), whose sum is σ = 24139430881152. Its totient is φ = 18104573160852.

The previous prime is 21122002020983. The next prime is 21122002021009. The reversal of 21122002021001 is 10012020022112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21122002021001 - 2⁴² = 16723955509897 is a prime.

It is a super-2 number, since 2×21122002021001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21122002021009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508714430065 + ... + 1508714430078.

It is an arithmetic number, because the mean of its divisors is an integer number (6034857720288).

Almost surely, 2^{21122002021001} is an apocalyptic number.

It is an amenable number.

21122002021001 is a deficient number, since it is larger than the sum of its proper divisors (3017428860151).

21122002021001 is an equidigital number, since it uses as much as digits as its factorization.

21122002021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017428860150.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21122002021001 its reverse (10012020022112), we get a palindrome (31134022043113).

The spelling of 21122002021001 in words is "twenty-one trillion, one hundred twenty-two billion, two million, twenty-one thousand, one".