21011121002 has 8 divisors (see below), whose sum is σ = 31805825700. Its totient is φ = 10409179104.

The previous prime is 21011120993. The next prime is 21011121011. The reversal of 21011121002 is 20012111012.

It is an interprime number because it is at equal distance from previous prime (21011120993) and next prime (21011121011).

It can be written as a sum of positive squares in 2 ways, for example, as 20603444521 + 407676481 = 143539^2 + 20191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48190427 + ... + 48190862.

Almost surely, 2^21011121002 is an apocalyptic number.

21011121002 is a deficient number, since it is larger than the sum of its proper divisors (10794704698).

21011121002 is a wasteful number, since it uses less digits than its factorization.

21011121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96381400.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21011121002 its reverse (20012111012), we get a palindrome (41023232014).

The spelling of 21011121002 in words is "twenty-one billion, eleven million, one hundred twenty-one thousand, two".