21053401215250 has 128 divisors (see below), whose sum is σ = 41969082355200. Its totient is φ = 7894300780800.

The previous prime is 21053401215239. The next prime is 21053401215271. The reversal of 21053401215250 is 5251210435012.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51860056 + ... + 52264444.

It is an arithmetic number, because the mean of its divisors is an integer number (327883455900).

Almost surely, 2^{21053401215250} is an apocalyptic number.

21053401215250 is a deficient number, since it is larger than the sum of its proper divisors (20915681139950).

21053401215250 is a wasteful number, since it uses less digits than its factorization.

21053401215250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404645 (or 404635 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21053401215250 in words is "twenty-one trillion, fifty-three billion, four hundred one million, two hundred fifteen thousand, two hundred fifty".