2145135212420 has 48 divisors (see below), whose sum is σ = 4769937024048. Its totient is φ = 807552245760.

The previous prime is 2145135212411. The next prime is 2145135212461. The reversal of 2145135212420 is 242125315412.

It can be written as a sum of positive squares in 8 ways, for example, as 124546879744 + 2020588332676 = 352912^2 + 1421474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11488124 + ... + 11673356.

It is an arithmetic number, because the mean of its divisors is an integer number (99373688001).

Almost surely, 2^{2145135212420} is an apocalyptic number.

2145135212420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145135212420 is an abundant number, since it is smaller than the sum of its proper divisors (2624801811628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145135212420 is a wasteful number, since it uses less digits than its factorization.

2145135212420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219320 (or 219318 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 2145135212420 in words is "two trillion, one hundred forty-five billion, one hundred thirty-five million, two hundred twelve thousand, four hundred twenty".