21125541030 has 32 divisors (see below), whose sum is σ = 55310508288. Its totient is φ = 5121343200.

The previous prime is 21125541023. The next prime is 21125541037. The reversal of 21125541030 is 3014552112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21125541023) and next prime (21125541037).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21125541037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32008066 + ... + 32008725.

It is an arithmetic number, because the mean of its divisors is an integer number (1728453384).

Almost surely, 2^21125541030 is an apocalyptic number.

21125541030 is an abundant number, since it is smaller than the sum of its proper divisors (34184967258).

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

21125541030 is a wasteful number, since it uses less digits than its factorization.

21125541030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64016812.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21125541030 in words is "twenty-one billion, one hundred twenty-five million, five hundred forty-one thousand, thirty".