21116412352650 has 48 divisors (see below), whose sum is σ = 52682287742784. Its totient is φ = 5597324465280.

The previous prime is 21116412352627. The next prime is 21116412352657. The reversal of 21116412352650 is 5625321461112.

It is a junction number, because it is equal to n+sod(n) for n = 21116412352599 and 21116412352608.

It is not an unprimeable number, because it can be changed into a prime (21116412352657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421460227 + ... + 421510326.

It is an arithmetic number, because the mean of its divisors is an integer number (1097547661308).

Almost surely, 2^{21116412352650} is an apocalyptic number.

21116412352650 is an abundant number, since it is smaller than the sum of its proper divisors (31565875390134).

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

21116412352650 is a wasteful number, since it uses less digits than its factorization.

21116412352650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842970735 (or 842970730 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 21116412352650 in words is "twenty-one trillion, one hundred sixteen billion, four hundred twelve million, three hundred fifty-two thousand, six hundred fifty".