21011333276 has 24 divisors (see below), whose sum is σ = 37278904320. Its totient is φ = 10360529712.

The previous prime is 21011333261. The next prime is 21011333297. The reversal of 21011333276 is 67233311012.

It is a super-2 number, since 2×21011333276² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234185 + ... + 311231.

It is an arithmetic number, because the mean of its divisors is an integer number (1553287680).

Almost surely, 2^21011333276 is an apocalyptic number.

It is an amenable number.

21011333276 is a deficient number, since it is larger than the sum of its proper divisors (16267571044).

21011333276 is a wasteful number, since it uses less digits than its factorization.

21011333276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77993 (or 77991 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 21011333276 its reverse (67233311012), we get a palindrome (88244644288).

The spelling of 21011333276 in words is "twenty-one billion, eleven million, three hundred thirty-three thousand, two hundred seventy-six".