1321142023251 has 24 divisors (see below), whose sum is σ = 1978552802304. Its totient is φ = 848594807280.

The previous prime is 1321142023247. The next prime is 1321142023309. The reversal of 1321142023251 is 1523202411231.

It is a happy number.

1321142023251 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 1 + 420 + 232 + 5 + 1 = 666.

It is not a de Polignac number, because 1321142023251 - 2² = 1321142023247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321142023051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10366791 + ... + 10493456.

It is an arithmetic number, because the mean of its divisors is an integer number (82439700096).

Almost surely, 2^{1321142023251} is an apocalyptic number.

1321142023251 is a deficient number, since it is larger than the sum of its proper divisors (657410779053).

1321142023251 is a wasteful number, since it uses less digits than its factorization.

1321142023251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20860511 (or 20860508 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1321142023251 its reverse (1523202411231), we get a palindrome (2844344434482).

The spelling of 1321142023251 in words is "one trillion, three hundred twenty-one billion, one hundred forty-two million, twenty-three thousand, two hundred fifty-one".