1021310232155 has 4 divisors (see below), whose sum is σ = 1225572278592. Its totient is φ = 817048185720.

The previous prime is 1021310232149. The next prime is 1021310232161. The reversal of 1021310232155 is 5512320131201.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1021310232149) and next prime (1021310232161).

It is not a de Polignac number, because 1021310232155 - 2²⁴ = 1021293454939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102131023211 + ... + 102131023220.

It is an arithmetic number, because the mean of its divisors is an integer number (306393069648).

Almost surely, 2^{1021310232155} is an apocalyptic number.

1021310232155 is a deficient number, since it is larger than the sum of its proper divisors (204262046437).

1021310232155 is an equidigital number, since it uses as much as digits as its factorization.

1021310232155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204262046436.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 1021310232155 its reverse (5512320131201), we get a palindrome (6533630363356).

The spelling of 1021310232155 in words is "one trillion, twenty-one billion, three hundred ten million, two hundred thirty-two thousand, one hundred fifty-five".