21016101552054 has 16 divisors (see below), whose sum is σ = 48036803547648. Its totient is φ = 6004600443432.

The previous prime is 21016101552023. The next prime is 21016101552167. The reversal of 21016101552054 is 45025510161012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250191685102 + ... + 250191685185.

It is an arithmetic number, because the mean of its divisors is an integer number (3002300221728).

Almost surely, 2^{21016101552054} is an apocalyptic number.

21016101552054 is an abundant number, since it is smaller than the sum of its proper divisors (27020701995594).

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

21016101552054 is a wasteful number, since it uses less digits than its factorization.

21016101552054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500383370299.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 21016101552054 in words is "twenty-one trillion, sixteen billion, one hundred one million, five hundred fifty-two thousand, fifty-four".