21002011211212 has 6 divisors (see below), whose sum is σ = 36753519619628. Its totient is φ = 10501005605604.

The previous prime is 21002011211191. The next prime is 21002011211317. The reversal of 21002011211212 is 21211211020012.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625251401398 + ... + 2625251401405.

Almost surely, 2^{21002011211212} is an apocalyptic number.

It is an amenable number.

21002011211212 is a deficient number, since it is larger than the sum of its proper divisors (15751508408416).

21002011211212 is a wasteful number, since it uses less digits than its factorization.

21002011211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250502802807 (or 5250502802805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21002011211212 its reverse (21211211020012), we get a palindrome (42213222231224).

The spelling of 21002011211212 in words is "twenty-one trillion, two billion, eleven million, two hundred eleven thousand, two hundred twelve".