21000012111202 has 4 divisors (see below), whose sum is σ = 31500018166806. Its totient is φ = 10500006055600.

The previous prime is 21000012111167. The next prime is 21000012111233. The reversal of 21000012111202 is 20211121000012.

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

It can be written as a sum of positive squares in only one way, i.e., 12711998721321 + 8288013389881 = 3565389^2 + 2878891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250003027799 + ... + 5250003027802.

Almost surely, 2^{21000012111202} is an apocalyptic number.

21000012111202 is a deficient number, since it is larger than the sum of its proper divisors (10500006055604).

21000012111202 is a wasteful number, since it uses less digits than its factorization.

21000012111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500006055603.

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

Adding to 21000012111202 its reverse (20211121000012), we get a palindrome (41211133111214).

The spelling of 21000012111202 in words is "twenty-one trillion, twelve million, one hundred eleven thousand, two hundred two".