21145510151044 has 24 divisors (see below), whose sum is σ = 37386709411968. Its totient is φ = 10463681042400.

The previous prime is 21145510151011. The next prime is 21145510151047. The reversal of 21145510151044 is 44015101554112.

21145510151044 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21145510151047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10019302 + ... + 11944765.

It is an arithmetic number, because the mean of its divisors is an integer number (1557779558832).

Almost surely, 2^{21145510151044} is an apocalyptic number.

It is an amenable number.

21145510151044 is a deficient number, since it is larger than the sum of its proper divisors (16241199260924).

21145510151044 is a wasteful number, since it uses less digits than its factorization.

21145510151044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21966555 (or 21966553 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The spelling of 21145510151044 in words is "twenty-one trillion, one hundred forty-five billion, five hundred ten million, one hundred fifty-one thousand, forty-four".