1021143233155 has 8 divisors (see below), whose sum is σ = 1225392703200. Its totient is φ = 816900704256.

The previous prime is 1021143233147. The next prime is 1021143233161. The reversal of 1021143233155 is 5513323411201.

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 1021143233155 - 2³ = 1021143233147 is a prime.

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, 1405950 + ... + 2004739.

It is an arithmetic number, because the mean of its divisors is an integer number (153174087900).

Almost surely, 2^{1021143233155} is an apocalyptic number.

1021143233155 is a deficient number, since it is larger than the sum of its proper divisors (204249470045).

1021143233155 is an equidigital number, since it uses as much as digits as its factorization.

1021143233155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470573.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 1021143233155 its reverse (5513323411201), we get a palindrome (6534466644356).

The spelling of 1021143233155 in words is "one trillion, twenty-one billion, one hundred forty-three million, two hundred thirty-three thousand, one hundred fifty-five".