21120021001102 has 4 divisors (see below), whose sum is σ = 31680031501656. Its totient is φ = 10560010500550.

The previous prime is 21120021001069. The next prime is 21120021001103. The reversal of 21120021001102 is 20110012002112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120021001103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280005250274 + ... + 5280005250277.

It is an arithmetic number, because the mean of its divisors is an integer number (7920007875414).

Almost surely, 2^{21120021001102} is an apocalyptic number.

21120021001102 is a deficient number, since it is larger than the sum of its proper divisors (10560010500554).

21120021001102 is a wasteful number, since it uses less digits than its factorization.

21120021001102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560010500553.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21120021001102 its reverse (20110012002112), we get a palindrome (41230033003214).

The spelling of 21120021001102 in words is "twenty-one trillion, one hundred twenty billion, twenty-one million, one thousand, one hundred two".