21011201002122 has 32 divisors (see below), whose sum is σ = 42534512163072. Its totient is φ = 6918897695424.

The previous prime is 21011201002111. The next prime is 21011201002147. The reversal of 21011201002122 is 22120010211012.

It is a super-3 number, since 3×21011201002122³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64302018 + ... + 64627949.

It is an arithmetic number, because the mean of its divisors is an integer number (1329203505096).

Almost surely, 2^{21011201002122} is an apocalyptic number.

21011201002122 is an abundant number, since it is smaller than the sum of its proper divisors (21523311160950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21011201002122 is a wasteful number, since it uses less digits than its factorization.

21011201002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128930302.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21011201002122 its reverse (22120010211012), we get a palindrome (43131211213134).

The spelling of 21011201002122 in words is "twenty-one trillion, eleven billion, two hundred one million, two thousand, one hundred twenty-two".