2021540961272 has 16 divisors (see below), whose sum is σ = 4331873488560. Its totient is φ = 866374697664.

The previous prime is 2021540961191. The next prime is 2021540961287. The reversal of 2021540961272 is 2721690451202.

It is a congruent 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, 18049472813 + ... + 18049472924.

It is an arithmetic number, because the mean of its divisors is an integer number (270742093035).

Almost surely, 2^{2021540961272} is an apocalyptic number.

It is an amenable number.

2021540961272 is an abundant number, since it is smaller than the sum of its proper divisors (2310332527288).

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

2021540961272 is a wasteful number, since it uses less digits than its factorization.

2021540961272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36098945750 (or 36098945746 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 2021540961272 in words is "two trillion, twenty-one billion, five hundred forty million, nine hundred sixty-one thousand, two hundred seventy-two".