12662021251 has 8 divisors (see below), whose sum is σ = 13822677504. Its totient is φ = 11502958920.

The previous prime is 12662021237. The next prime is 12662021261. The reversal of 12662021251 is 15212026621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12662021251 - 2⁷ = 12662021123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662021261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381835 + ... + 413668.

It is an arithmetic number, because the mean of its divisors is an integer number (1727834688).

Almost surely, 2^12662021251 is an apocalyptic number.

12662021251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12662021251 is a deficient number, since it is larger than the sum of its proper divisors (1160656253).

12662021251 is a wasteful number, since it uses less digits than its factorization.

12662021251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796961.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 12662021251 its reverse (15212026621), we get a palindrome (27874047872).

The spelling of 12662021251 in words is "twelve billion, six hundred sixty-two million, twenty-one thousand, two hundred fifty-one".