21121312283 has 2 divisors, whose sum is σ = 21121312284. Its totient is φ = 21121312282.

The previous prime is 21121312279. The next prime is 21121312307. The reversal of 21121312283 is 38221312112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121312283 - 2² = 21121312279 is a prime.

It is a super-2 number, since 2×21121312283² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21121312213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560656141 + 10560656142.

It is an arithmetic number, because the mean of its divisors is an integer number (10560656142).

Almost surely, 2^21121312283 is an apocalyptic number.

21121312283 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121312283 is an equidigital number, since it uses as much as digits as its factorization.

21121312283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

Adding to 21121312283 its reverse (38221312112), we get a palindrome (59342624395).

The spelling of 21121312283 in words is "twenty-one billion, one hundred twenty-one million, three hundred twelve thousand, two hundred eighty-three".