21611245275102 has 64 divisors (see below), whose sum is σ = 49734282240000. Its totient is φ = 6132507114240.

The previous prime is 21611245275073. The next prime is 21611245275119. The reversal of 21611245275102 is 20157254211612.

It is a super-2 number, since 2×21611245275102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56437827 + ... + 56819457.

It is an arithmetic number, because the mean of its divisors is an integer number (777098160000).

Almost surely, 2^{21611245275102} is an apocalyptic number.

21611245275102 is an abundant number, since it is smaller than the sum of its proper divisors (28123036964898).

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

21611245275102 is a wasteful number, since it uses less digits than its factorization.

21611245275102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390841.

The product of its (nonzero) digits is 67200, while the sum is 39.

Adding to 21611245275102 its reverse (20157254211612), we get a palindrome (41768499486714).

The spelling of 21611245275102 in words is "twenty-one trillion, six hundred eleven billion, two hundred forty-five million, two hundred seventy-five thousand, one hundred two".